Astrophotography lens choice - Google Pixel 4 Questions & Answers

Hi,
I e recently got back in to astronomy thanks to my new pixel 4 however it has an annoying habit of switching lens at the last moment when you have an eyepiece adapter fitted to use it with a scope! Is there a way to force (preferably the telephoto) a lens so I can frame a shot and take a photo?
Thanks

If you zoom in to 1.9 or higher, it should activate the telephoto lens.

Zico 10 said:
If you zoom in to 1.9 or higher, it should activate the telephoto lens.
Click to expand...
Click to collapse
That does work but if it loses focus, as it can easily do during an astro shot and fitted to a telescope, it falls back to the wide lens, even at higher than 2x zoom

You should be setting focus to infinity when taking astrophotography, that way it shouldn’t change focus throughout the shot.

Related

camera video quality

I took a couple of videos and the quality to me just isn't that great. This is with the UHD setting. Just isn't that clear for UHD.
I agree I had lots of noise/grain in mine. FHD60 seems a bit cleaner
This is a pic zoomed in half way. Looks awful. I bought this phone because the camera was supposed to be unreal. Is this normal or just maybe I have a bad cam?
Shot some video in a dark bar venue of a band playing. Using the main lens and manual settings, it turned out really well. The wide angle left a bit to be desired as shot but I think I have an idea for that lens. Shot with 1080 at 30fps high bit rate. Posted it in another thread over the weekend.
And at full zoom
Shot at 1080 30...
anth75 said:
Shot at 1080 30...
Click to expand...
Click to collapse
Looks as though you may have a dirty lens.
The light in the room is a give away of grease or finger prints across lens. As the ceiling light starts to chase across your shot.
Same thing can cause grainy pictures. As it effects even a camera shot the same way.
Always try cleaning the lens if the shot seems to be poor.
shwnr11 said:
Looks as though you may have a dirty lens.
The light in the room is a give away of grease or finger prints across lens. As the ceiling light starts to chase across your shot.
Same thing can cause grainy pictures. As it effects even a camera shot the same way.
Always try cleaning the lens if the shot seems to be poor.
Click to expand...
Click to collapse
I've tried to clean the lens, no luck. Do u think it's the phone itself?
Did you set to record in high bit rate?
Personally, I think the camera, both video and still, is the weakest part of the phone. I am not happy with that, but will live with it until the Note 8 comes out.
And you removed protector of the camera lens?
anth75 said:
Shot at 1080 30...
Click to expand...
Click to collapse
What other settings did you use? (ISO, Shutter Speed, Bit Rate, Filters?)
I will say that it looks like you're using the digital zoom, which is always problem #1. Never use digital zoom unless you have to do so. Whoever came up with this gimmick should be dragged out into the street and hung. It just doesn't get you anything but a mess. Optical zoom is optimal. Bipedal zoom is your secondary option. Digital zoom just shouldn't be an option. It is quite literally the option you choose when you want to have some sort of shot, any shot, and you don't care about the quality of the shot. This goes for any device from a cellphone up to a DSLR.
---------- Post added at 12:32 PM ---------- Previous post was at 12:21 PM ----------
This was shot in a very dark bar venue with mediocre stage lighting. (Strike one against getting decent footage.) ISO 3200 (Another strike against any decent footage as you're maxing out the gain on the sensor.) 1080 at 30fps so I used a shutter speed of 1/60. I used the high bit rate setting. The refocusing is me touching the screen as I couldn't tell if I had good focus since it was dark and my eyes kinda suck these days without readers. I was playing with the audio settings and had no idea how to set it for a concert so I cheated and used approximately what I found for concert settings in the HD recorder app.
Considering the conditions..... the V20 did extremely well! I could pick things out in the audio that I couldn't live in person. In person, it was just a wall of sound sometimes. The video turned out amazing for being a tiny camera sensor. The only real thing I can knock the V20 on is the video stabilization. There needs to be settings somewhere so I can turn the OIS and EIS off and on so I know if it is on or off.
Are you using the stock cam app? I don't see anything where I can change the zoom type.
anth75 said:
Are you using the stock cam app? I don't see anything where I can change the zoom type.
Click to expand...
Click to collapse
Yup, stock camera app. There is no setting for changing the zoom type. If you aren't clicking the one tree/three tree buttons, then you are going through a digital zoom. Only clicking those two buttons uses purely "optical zoom" although in reality, you're just completely switching cameras. (Different sensors and different lenses which presents its own issues since the wider view uses a smaller sensor and smaller aperture while the main shooter uses a "larger" sensor and larger aperture.)
Using pinch to zoom or the zoom slider means you're going through digital zoom. So if you start at the widest setting with the wide view and start zooming, the image quality is only going to get worse until you pop over into the main imaging group. Then if you continue to zoom, the image quality will degrade again. The best quality you're ever going to get out of any single focal length imaging assembly (which is what we're technically dealing with here, two single focal length imaging assemblies) is at its native focal magnification and at its base ISO. Which the photo options says is 50 but that's not always necessarily true, I'd have to look up the native sensor ISO online to be sure.
Did an unprocessed and processed test with my v20. By far the best dynamic range of any phone camera I've worked with.
---------- Post added at 01:16 PM ---------- Previous post was at 01:07 PM ----------
CHH2 said:
What other settings did you use? (ISO, Shutter Speed, Bit Rate, Filters?)
I will say that it looks like you're using the digital zoom, which is always problem #1. Never use digital zoom unless you have to do so. Whoever came up with this gimmick should be dragged out into the street and hung. It just doesn't get you anything but a mess. Optical zoom is optimal. Bipedal zoom is your secondary option. Digital zoom just shouldn't be an option. It is quite literally the option you choose when you want to have some sort of shot, any shot, and you don't care about the quality of the shot. This goes for any device from a cellphone up to a DSLR.
Click to expand...
Click to collapse
The only positive thing I found about the digital zoom on the v20 which is unique in my experience is that when you're shooting 1080p on other phones, even though it's a 4k sensor it zooms up on the post sampled 1080p frame instead of taking advantage of the 4k sensor and zooming up without any quality loss. The V20 appears to do just that and up to a point there's no fidelity loss with the digital zoom because you're sampling a smaller section of the sensor..
vargala81 said:
And you removed protector of the camera lens?
Click to expand...
Click to collapse
Don't remove that. It helps protect the glass from scratches and shatter.
anth75 said:
This is a pic zoomed in half way. Looks awful. I bought this phone because the camera was supposed to be unreal. Is this normal or just maybe I have a bad cam?
Click to expand...
Click to collapse
Did you gain any insight to help fix your grainy pic issues? I'm having the same problem. I keep seeing people suggest to remove the plastic protector but it has cutouts for the lenses and the sensors so I don't see how that makes a difference. I'm taking pictures without any zooming but when I take a look at the results and zoom in to different parts to review, it looks horrible and grainy.
arn82 said:
Did you gain any insight to help fix your grainy pic issues? I'm having the same problem. I keep seeing people suggest to remove the plastic protector but it has cutouts for the lenses and the sensors so I don't see how that makes a difference. I'm taking pictures without any zooming but when I take a look at the results and zoom in to different parts to review, it looks horrible and grainy.
Click to expand...
Click to collapse
What is your photo size set at? 16mp or 12mp?
arn82 said:
Did you gain any insight to help fix your grainy pic issues? I'm having the same problem. I keep seeing people suggest to remove the plastic protector but it has cutouts for the lenses and the sensors so I don't see how that makes a difference. I'm taking pictures without any zooming but when I take a look at the results and zoom in to different parts to review, it looks horrible and grainy.
Click to expand...
Click to collapse
I haven't. I wouldnt take the plastic off. As you said, it has cutouts for the lens. Not impressed at all with the camera
I'm amazed at your low light video. I also thought the camera was the weak point of the phone. Guess I need to work on my manual focus skills.
Sent from my VS995 using Tapatalk

Is my front facing camera ****?

Gidday folks, just got this awesome new phone but I'm incredibly concerned about the front facing camera... See my attached pics and let me know.
Excuse the ug face...
The front facing camera on the G6 isn't brilliant. To get the best possible image quality from it it's best to use the wide angle setting as the zoomed setting is just a crop of the wide angle image.
The front camera is definitely one of its weak points though.
Sent from my LG-H870 using Tapatalk
Don't know why LG reduced from 8mp to 5mp to the front camera? Use the rear wide angle camera and use it for selfies.

does Telephoto lens really works?

Hi is it just me that when i take 2x zoom photo,it doesn't use the telephoto lens or in this case the camera on the left one,i tried to covered it up with my finger but its doesn't affect anythings, its all work in wide lens,camera on the right one either i took 1x or 2x zoom.
But i noticed when in portrait mode it does the job
In XDA review it was mentioned, that telephoto lens is used only in high light scenes (sunny and outdoors), otherwise the phone is using only digital zoom.
_mysiak_ said:
In XDA review it was mentioned, that telephoto lens is used only in high light scenes (sunny and outdoors), otherwise the phone is using only digital zoom.
Click to expand...
Click to collapse
Thanks man its explain everything
Yeah when you click on the 2x it doesn't seem to work...but there's a work around..go to manual and change the lens ...it'll work fine...just keep everything in Auto and use it.

I know what's wrong with g5plus camera.

The highlighted thing about g5 plus was also the reason for bad camera. The 1.7 aperture and wide angle camera are the cause here. Though it is good for shots within a certain distance like 10-15 feet. But any further the pictures loose sharpness and gets noisy due to which moto decided to use high denoising due to which the photos look soft. My father's redmi 4 clicks better distance pictures than this. It has 2.0 aperture and little less wide angle lens.
Don't forget that G5 Plus have the same camera sensor as HTC U11 or Asus Zenfone 4 (which takes good pictures on stock software).
Worse photo quality is caused by software (Motorola/Lenovo screw it up).
Did you tried any mods/apps? You can find a lot of these, but I suggest you to try Google camera app port.
.czarodziej said:
Don't forget that G5 Plus have the same camera sensor as HTC U11 or Asus Zenfone 4 (which takes good pictures on stock software).
Worse photo quality is caused by software (Motorola/Lenovo screw it up).
Did you tried any mods/apps? You can find a lot of these, but I suggest you to try Google camera app port.
Click to expand...
Click to collapse
I use bacon camera on stock Android without root.
I disabled noise reduction and use hdr with manual mode and stable hands to get though grainy but nice pictures. Though the app is not perfect but it works
When I first got the G5+ I thought the camera was too dark... While a lower aperture may help in low light shots it does cause a bit of trouble for highly illuminated scenes.
HDR does compensate but it's nothing like HDR+ from Google.
Plus, terrible sharpen and overdone Noise Reduction excessive Color NR.
I felt quite dissapointed comparing it to my old Titan (G2)
Anyone tried to mod the camera to enable debug mode? You can disable noise reduction from there
ugupta100 said:
The highlighted thing about g5 plus was also the reason for bad camera. The 1.7 aperture and wide angle camera are the cause here. Though it is good for shots within a certain distance like 10-15 feet. But any further the pictures loose sharpness and gets noisy due to which moto decided to use high denoising due to which the photos look soft. My father's redmi 4 clicks better distance pictures than this. It has 2.0 aperture and little less wide angle lens.
Click to expand...
Click to collapse
Coming from an old school enthusiast of photography background - you're aperture on your lens (in this case f1.7) isn't going to cause noise - that's a function of the sensor. A lot changed when we went from film to digital sensors, but the impact of the f number of the lens did not.
You might be on to something with the with loss of sharpness though. Typically a fixed focal length lens is at it's sharpest at it's only setting... but they very well could have forked this up.
Given that the camera does pretty adequately with other camera software or other hacks - I don't think it's a hardware issue or lens issue. It could be a cut rate sensor...
It could also just be that whomever chose the default settings for this camera did a bad job
pwag said:
Your aperture on your lens (in this case f1.7) isn't going to cause noise - that's a function of the sensor. A lot changed when we went from film to digital sensors, but the impact of the f number of the lens did not.
Click to expand...
Click to collapse
What about shadows in bright scenes such as outdoor scenery?
I mean, wouldn't lens aperture like f2.2 preserve more of these details?
That's a function of the film/sensor.
Your f number controls light and the depth of field (area that's in focus) - a smaller f number is more desirable because it allows more light to the film/sensor.
The only thing different here than fine that I can see is the size/diameter of the lens related to the f number. A larger f number, like f 8 or f16 increases the depth of field and sharpness, but at the cost of light hitting the film/sensor. That results in a longer exposure time.
A wide open f stop means more light and shorter exposure times.
One thing we gained with sensors over film is a wider range between highlights and shadows... You could get more shadows and more highlights. Film could get only so much of that before shadows went black and highlights blew out to white. But you still have a limited range. You can't get it all. In order to keep the highlights from going completely white you have to trade off some of the shadow range.
It's early and I'm probably explaining this horribly. Your spectrum between black and white or shadows and highlights is very long. But your camera sensors capability can only encompass a range of that spectrum. If the spectrum were a line of shades of grey from black to white that was, say, 10 units long, the range you could get in one image might be six units long. You've gotta give up somcombo of four units either at the black end of the spectrum or the light side.
If the cameras loaing details in the shadows that's because it's opting to the highlight/light end of the range.
So lens doesn't play a huge role in what chunk of the spectrum the film/sensor can encompass. But does play a role in how quickly the sensor can collect that info. Higher f number = smaller amounts of light on the sensor = longer exposure times.
My guess would be that the sensor or software is biased toward highlights because it results in faster exposures making life easier for snap shots and selfies.
M1810 said:
Anyone tried to mod the camera to enable debug mode? You can disable noise reduction from there
Click to expand...
Click to collapse
If you guys paid attention for once on this XDA, you might have seen my damn thread or the chromatixx thread https://forum.xda-developers.com/g5-plus/how-to/workaround-noise-reduction-t3744031
https://forum.xda-developers.com/g5-plus/themes/modcamera-aggressive-sharpening-noise-t3604458

S10 Plus Camera, defect?

If I'm posting in the wrong place I'm sorry, I bought a galaxy s10+ May 5th and I noticed a small noise when changing the camera open from 1.5 to 2.4 and from 2.4 to 1.5, it makes a low and different noise, I wanted to know if it is common of the device that annoying little noise or if it is some type of defect, I am from Brazil and I have the version SM-G975F.
Perfectly normal.
cpufrost said:
Perfectly normal.
Click to expand...
Click to collapse
the telephoto lens is raised when the aperture goes to 2.4, is it normal too?
rodrigoduarteh said:
the telephoto lens is raised when the aperture goes to 2.4, is it normal too?
Click to expand...
Click to collapse
It's perfectly normal, the clicky noise is the variable aperture mechanism.
Telephoto only has F2.4, if you try to use the telephoto lens in a dark place it will automatically switch to cropped F1.5 on the standard camera, that's why you see the view changing a bit.
Corv0 said:
It's perfectly normal, the clicky noise is the variable aperture mechanism.
Telephoto only has F2.4, if you try to use the telephoto lens in a dark place it will automatically switch to cropped F1.5 on the standard camera, that's why you see the view changing a bit.
Click to expand...
Click to collapse
try to see the application of the camera and switch to the dynamic focus, the camera without being the variable opening moves, I find this mt strange I'm almost asking for the replacement of the device,
puts it in the dynamic focus mode and looks behind the device and sees if the telephoto lens of a "jumped"
edit 1 :
I'm asking a lot of questions to make sure that it's common because I'm afraid to ask for the appliance to change,
I appreciate the answers and understanding.
rodrigoduarteh said:
try to see the application of the camera and switch to the dynamic focus, the camera without being the variable opening moves, I find this mt strange I'm almost asking for the replacement of the device,
puts it in the dynamic focus mode and looks behind the device and sees if the telephoto lens of a "jumped"
edit 1 :
I'm asking a lot of questions to make sure that it's common because I'm afraid to ask for the appliance to change,
I appreciate the answers and understanding.
Click to expand...
Click to collapse
You mean that it physically moves?
I have the same, the telephoto lenses move by a bit when the main camera changes aperture, but it only moves between the same two positions, I think it's nothing to worry about, it doesn't really have room to move anywhere else since the 3 cameras are locked together, I remember noticing the same on all retail units, don't worry about it unless it looks misaligned or pictures start to look distorted.
rodrigoduarteh said:
try to see the application of the camera and switch to the dynamic focus, the camera without being the variable opening moves, I find this mt strange I'm almost asking for the replacement of the device,
puts it in the dynamic focus mode and looks behind the device and sees if the telephoto lens of a "jumped"
edit 1 :
I'm asking a lot of questions to make sure that it's common because I'm afraid to ask for the appliance to change,
I appreciate the answers and understanding.
Click to expand...
Click to collapse
Tried what you said, switching from normal to dynamic focus while looking at the lenses, I can se the main camera switching aperture (opens an closes) and the camera telephoto lens move a little bit (like a shake) dont know if that is the stabilization part of the lens activating
mathab said:
Tried what you said, switching from normal to dynamic focus while looking at the lenses, I can se the main camera switching aperture (opens an closes) and the camera telephoto lens move a little bit (like a shake) dont know if that is the stabilization part of the lens activating
Click to expand...
Click to collapse
The main camera's aperture mechanism is magnet based and it seems to interact with the telephoto's OIS, also magnet based, they shake each other but no big deal.
You can try it yourself with a strong magnet, you'll see it pulling/pushing the telephoto module depending on the angle.

Categories

Resources