a55 settings for shooting documents

Post » Thu Dec 03, 2015 5:08 pm

I have an a55 with the 18-55mm lens. I shoot documents in an archive and need the best possible resolution. I cannot use a tripod or flash. The lighting in the archive is artificial and pretty good. The problem is that when I shoot maps (36''X48") the center and most of the shot are great but the corners are fuzzy/blurry. Can anyone suggest modes/functions/settings that would eliminate or greatly reduce the fuzzy corners?

User avatar
Lori Joe
 
Posts: 537
Joined: Tue Jun 20, 2006 12:10 am

Post » Thu Dec 03, 2015 5:02 pm

The problem isn't the camera.

The problem is the lens.

The 18-55 has significant distortion and field curvature, as do most E-Mount lenses. You can try stopping down the aperture which might help a little with the soft corners, but it won't help with the distortion.

The Sony/Zeiss Vario-Tessar T* E 16-70 mm F4 ZA OSS ($700.

Another option might be the $280 Sony E 30 mm F3.5 Macro (http://www.sony.com/electronics/camera-lenses/sel30m35), but you'll get your best results from the $1,100 Sony FE 90 mm F2.8 Macro G OSS (http://www.sony.com/electronics/camera-lenses/sel90m28g) but the longer focal length might introduce other problems.

1 The Lens is the Thing
2 'Full Frame' is the new 'Medium Format'
3 "One good test is worth a thousand expert opinions." - Wernher von Braun.
User avatar
Zoe Ratcliffe
 
Posts: 491
Joined: Sun Feb 18, 2007 6:45 pm

Post » Thu Dec 03, 2015 4:33 pm

By stopping down aperture you mean lower fstop or higher fstop? Also could it be a depth of field issue? If so, I was thinking about shooting them further away in RAW and then cropping? Would a panorama or multi-shot approach work?

User avatar
Tammie Flint
 
Posts: 527
Joined: Sun Aug 13, 2006 6:12 pm


Return to Cameras & Camcorders

cron