If you have CS6 or later, I would try Adaptive Wide Angle under the filter menu. Also if you are taking a lot of photos of artwork, I would invest in a set of 12" polarizing filters that ou can place over two lights set at 45 deg to the art work, then another polarizing filter over your lens. That way you can eliminate all reflections.
This works!! Thank you! Not only for this, which I have been googling for quite a lot of times, but also for the other advice. I will get polarizing filters. Certainly worth the investment for thousands of photos of artworks.
Good. I used to make copy negatives for some labs, and I always used the polarizing filters, They work great!!! Just line up the two ones on the lights in the same direction then adjust the one on the camera to remove all reflections. I would often put a dime next to the photo, then adjust the filter. When the dime turned as dark as possible, that was good for the photo as well. If you are doing thousands of images, it will save you so much time and grief!!!
I found a store where I can easily find the right filter for my camera. Maybe for the two lamps as well, not sure yet. I think a week from now I can start with my photos.
I am very happy with your advice!
This is what I use. I've got 12" reflectors with a 12" filter holder that clamps onto the reflector, but you could tape them on. You just want the axis going in the same direction.
This makes it lots easier. I wondered how I could mount filters, any filter, on the lamps I use. They are not especially for photos, so I didn't expect any type of lens fitting on them. But with a cardboard frame it is no problem. Tape being the simplest way.
I ordered a Hoya filter for the camera, after searching for information about good brands.
I found the way to do it! The way you mentioned does work, but there is a special button just for what I need.
Select a square - or the entire image
Go to edit - free transform
Then you should see a button in the options (top of screen) with a square divided in 4 and a kind of little sad mouth (like a smiley) underneath.
This puts a grid on you image, and it is very easy to pull out or in whichever side you need to get straight (or crooked if that is what you want...)
I've seen Russell Brown make creative use of Free Transform > Warp to fix issues like that. One use was as an alternative to Content Aware Fill when fixing the missing corners invariably left after a panorama merge. Just pull the image into the corner with FT > warp to leave CAF with less to do.
But he also use FT Warp to remove distortion from just one side of an image. He is a real left field thinker, and PD clever.
Check out his use of Adaptive Wide Angle and Panorama merge in his quadcopter series. I thought that was dead clever because the image goes through massive distortion, and I for one, would have thought it a dead loss and given up. But RB saw the process right through in is minds eye, and did some real magic.
Use this Adobe TV link, and you'll see the other videos over on the right. 'Warp Reality' is the one to watch, but do them all in order.
He really works magic! And the guy himself is great to watch!
I am going to check it all out. He is clear, easy to follow, and does wonderful things.