Sony lens problems.
Linary wrote:
The attached image is Photoshop's interpretation of your image in and out of focus. (Masked area indicates not in focus.)
That which is in focus appears soft.
Your shutter speed of 1/50th may not be fast enough even on a tripod in windy conditions, but another possibility is that there was a very slight movement of the camera when the shutter release was activated. (See how the masked area is a little more pronounced on the right hand side - only the base of the telegraph pole is sharp whilst the upper parts are blurred - and thus masked out. The single sheep in focus is near to the centre of the image.
Use the same lens at f/8, on tripod, stabilisation off, mirror up, remote or timer release. ISO up a bit to shorten the shutter speed and see if there is an improvement.
The attached image is Photoshop's interpretation o... (
show quote)
Hello Linary,
Thanks much for taking the time for me.
I'll go shoot a bit today and do as you've suggested. I"ll shoot at f8 again and use a bit higher ISO. On that photo I adjusted the exposure by using aperture mode, with f8, and adjusting the EV to 'shoot to the right'. I thought the exposure looked about right but surely a higher shutter speed can't hurt. Also the stabilization was turned off and I used a 2 second delay for the shutter. No wind and no mirror.
I do have a question for you though. If there were wind or anything else that caused some slight camera movement and therefore caused the photo to be blurry, would not the entire photo be blurry ? What might cause some of the photo would be sharp and some not ?
Thanks again
Lille wrote:
Hello Linary,
Thanks much for taking the time for me.
I'll go shoot a bit today and do as you've suggested. I"ll shoot at f8 again and use a bit higher ISO. On that photo I adjusted the exposure by using aperture mode, with f8, and adjusting the EV to 'shoot to the right'. I thought the exposure looked about right but surely a higher shutter speed can't hurt. Also the stabilization was turned off and I used a 2 second delay for the shutter. No wind and no mirror.
I do have a question for you though. If there were wind or anything else that caused some slight camera movement and therefore caused the photo to be blurry, would not the entire photo be blurry ? What might cause some of the photo would be sharp and some not ?
Thanks again
Hello Linary, br br Thanks much for taking the ti... (
show quote)
Were you on a tripod or hand held? I did not see where you addressed that.
I hv the Sony A7 and the first lens you mentioned purchased new in Jan 2015, and it shoots sharp. I am wondering if yr camera was set up by the original owner for back button focus? If the focusing function was decoupled from the shutter button it might be the issue?
mwsilvers wrote:
What were you actually focusing on? Besides the slow shutter speed everything is very soft EXCEPT for the fence post in the bottom middle which, although not tack sharp, is reasonably sharp. Does your camera have different focus modes allowing you to choose individual focus points or groups of points to train directly on your subject? With traditional mirrored DSLR's when you use all focus points, especially in auto mode, the cameras will tend to focus on the closest object in view, which in this case would be the bottom center fence post. I don't how whether a mirrorless camera like yours would respond similarly, but I wonder if that might be the problem. I'm also not familiar with the shooting modes for your camera. Were you shooting in full auto?
What were you actually focusing on? Besides the sl... (
show quote)
Hi again,
I was in aperture mode and in fact the camera was spot focused on that very fence post just to the right of the bottom center. This Depth of Field calculator (
https://www.photopills.com/calculators/dof ) tells me that with a 30mm lens at f8 a point 13 feet from the camera is the hyper focal distance. Therefore at f8 focusing on something 13 feet from the camera should render everything from about 6 feet from the camera to infinity in focus. That fence post was 14 feet in front of the camera. So unless I'm misunderstanding what the calculator is telling me ( quite possible ! ) that fence post and everything beyond it should have been in focus.
More practice is obviously needed !
Teutsad wrote:
I hv the Sony A7 and the first lens you mentioned purchased new in Jan 2015, and it shoots sharp. I am wondering if yr camera was set up by the original owner for back button focus? If the focusing function was decoupled from the shutter button it might be the issue?
Hi,
I have the camera set up for back button focus. This lens seems to be quite soft regardless of how I focus the camera. Weather I use one of the 5 auto focus modes ( via back button focus ) or manual focus I still can't seem to get a sharp shot.
Thanks !
dsmeltz wrote:
Were you on a tripod or hand held? I did not see where you addressed that.
Hi,
The camera was on a tripod with it's vibration reduction turned off and with a 2 second time delay.
Thank you !
pecohen wrote:
Are you looking at RAW, unprocessed images? Without processing they may look pretty soft.
Hello pecohen,
Although I've still go much to learn about Lightroom the photo is post processed.
Thanks
I have not idea as to what you are doing, I have the same camera and the exact same lens, I went to Earth Day Jazz Festival in INGLEWOOD CA this past Saturday and shot over 800 images using both those lens and out of 800 there was only 20 that we’re out of focus, the 24-70 is my everyday lens, so in my opinion it’s not the lens nor the camera you need more practice and reading, only my opinion, good luck
Leave steady shot on and OSS on when using a tripod. These systems are made to work together and to work when on tripod. As technology in photography advances our previous rules need a rewrite to include these advances.
These lenses will focus on the nearest thing. You need to something to focus on when setting the hyper focus.
chapjohn wrote:
Leave steady shot on and OSS on when using a tripod. These systems are made to work together and to work when on tripod. As technology in photography advances our previous rules need a rewrite to include these advances.
These lenses will focus on the nearest thing. You need to something to focus on when setting the hyper focus.
OK I"ll leave them on. I had read online that it was best to turn them off when using a tripod but I'll take your suggestion.
I spot focused on the fence post in the lower center of the photo which was just one foot beyond the hyper focal distance. I thought that would do.
Thanks !
jerryc41 wrote:
Here's a list of (too many?) focus-checking links.... (
show quote)
LOL ! Thanks Jerry. I'll go read all of those and get back to you sometime before June or July !
Seriously though.... Thanks :)
I owned a A7RII and now an A7RIII and A7III and you should not be having these issues. You need to try this camera with a different lens, any E-Mount lens, back at a camera store or from anyone you know who has Sony gear. My guess, beyond too slow a shutter speed to handhold, is it may be the camera. Highly unusual, but possible you have a damaged sensor that is out of alignment, or an IBIS that is gone bad. Again I have NEVER heard of this in ANY Sony ASeries camera.
Even if your camera and lens are out of warranty, or have none, I would still contact Sony support for help with your issues:
https://esupport.sony.com/US/p/select-system.pl?DIRECTOR=CONTACTAgain, your case is the first I have ever heard about this camera, and I never had any focus issues when I had the A7rII and none with my A7RIII and A7III. Please keep us informed here, ok.
If when you try another lens, the problem is gone, then it was the two lenses. Again the odds are against both lenses being bad.
Lille wrote:
Hi all,
A bit of a problem and I figure this is the place to find answers...<snip, snip>
You've been around this stuff for some time, a uhh member for over 5 years now, and used other equipment enough to probably know that there's something wrong with your lenses, or camera, but you might be able to give them a little better test and answer your own question a little more definitively. Rather than aim the lens at a wide open field, as you have in that image you posted, I'd like to suggest that you perform a more specific test. Get something like an eye test chart, a rifle target, something with distinct and fine lines on it, tack it to a fence a few feet away in good light, with no wind, and do the tripod thing with a remote control or use the 10 second timer rather than the two second, getting some images that you can blow up and see whether or not your lenses are focusing properly. It is often said that many lens are sharpest a couple of steps up from wide open. Don't just shoot at f/8 but rather, try other f/stops and see if there are other stops that give you sharper images than f/8 - maybe from f/4 to f/16, for instance and compare them against f/8. Some people use a newspaper or a magazine cover as targets even. It doesn't look to me like you're giving your lens much of a test, aiming them into a wide open field like that, with no particular discernible subject even though you say you did roughly use the bottom of that fence post as a tentative subject. It certainly isn't all that evident just what you were shooting at upon first glance.
If you want to reply, then
register here. Registration is free and your account is created instantly, so you can post right away.