Tess Martin
  • Female
  • Seattle, WA
  • United States
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Tess Martin's Discussions

Can't get my lens to focus

Started this discussion. Last reply by StopmoNick Feb 24. 17 Replies

Hi all! Hope you can help. I am working on a paint-on-glass project on my multi-plane animation stand, and I can't get my lens to focus perfectly. This is the best I can get:…Continue

Tags: Nikon, camera, focus, lens

 

Tess Martin's Page

Latest Activity

StopmoNick replied to Tess Martin's discussion Can't get my lens to focus
"This guy has reviewed a lot of Nikkor lenses -   https://kenrockwell.com/nikon/nikkor.htm Issues like edge sharpness would be just as important to still photographers, so there is a chance you can get info on that for various lenses.…"
Feb 24
Strider replied to Tess Martin's discussion Can't get my lens to focus
"Oh, I just realized, I think most if not all CCTV and security cam lenses use a C-Mount, so would be too small to use on a DSLR. Face-palming hard right now - sorry!! "
Feb 23
Strider replied to Tess Martin's discussion Can't get my lens to focus
"I just remembered I have a blog post with some details about how I used cropping. I was using a lens that didn't get full coverage for my camera's sensor, the image ended up being a small circle in a black rectangle. Biut I was able to…"
Feb 23
Strider replied to Tess Martin's discussion Can't get my lens to focus
"Thanks Anthony, that was quick! It's good to know the team is responsive.  If you're looking at the really wide lenses and don't want distortion, you want what are called Rectilinear wide angle lenses. That means the image…"
Feb 23
Simon Tytherleigh replied to Tess Martin's discussion Can't get my lens to focus
"Most lenses work best in the middle of their aperture settings, so around f8 to f11. This would help establish how much the focus drops off towards the edges. It should be very little for a prime made by Nikon. I wonder if the closeness of the…"
Feb 23
Tess Martin replied to Tess Martin's discussion Can't get my lens to focus
"Yes, I used a focusing card to determine that the effect (less focus on the edges) is lessened when the artwork is farther from the lens. And I also adjusted the artwork to match the new level/placement in the field. Feels a bit like a band-aid, I…"
Feb 22
Simon Tytherleigh replied to Tess Martin's discussion Can't get my lens to focus
"Obvious point, perhaps, but a focusing card would show when it is sharp, and might be helpful to show where the edge sharpness drops off."
Feb 22
StopmoNick replied to Tess Martin's discussion Can't get my lens to focus
"Strider, I just tested it and I can't edit my post either, same thing happens.  I'm using an iMac with Safari 12.0.3.   Wanted to edit because I see now that my suggestion is the same as yours, I just hadn't read carefully…"
Feb 21
StopmoNick replied to Tess Martin's discussion Can't get my lens to focus
"A thought - a DSLR will take a much bigger image than you need for HD video, and many bigger than 4k as well.   What resolution will you finish the film in?  So you could move the animation in from the outside edge, and plan to crop the…"
Feb 21
Strider replied to Tess Martin's discussion Can't get my lens to focus
"I can't edit my posts in here anymore - maybe I need to use a different web browser. When I click the edit button it just jumps back to the top of the page, to Tess' first post on this thread.  What I wanted to add is you could try…"
Feb 21
Strider replied to Tess Martin's discussion Can't get my lens to focus
"Ah of course - I failed to think of the fact that things toward the edges will be harder to focus/won't look as good in general, but that's absolutely true. One way you could try to deal with it is by shooting wider than you need and then…"
Feb 21
Tess Martin replied to Tess Martin's discussion Can't get my lens to focus
"Thanks for your reply! I got some ideas from another paint-on-glass animator, and tried a number of other things. I think it is a combination of: 1. the lens focusing more precisely on the center of the field than on the edges 2. the backlighting…"
Feb 21
StopmoNick replied to Tess Martin's discussion Can't get my lens to focus
"I'm baffled too.  In theory you should be able to get a sharp focus on just the dog drawing, since it is flat, with any aperture.  (As long as you are not closer than the lens is able to focus - I don't think the 28mm is a macro…"
Feb 21
Strider replied to Tess Martin's discussion Can't get my lens to focus
"Oops! Sorry, didn't recognize the name, I assumed you were a newbie. Now I remember seeing you around here before, and you probably could teach me a few things. No sorry, I got nothin' else. "
Feb 20
Tess Martin replied to Tess Martin's discussion Can't get my lens to focus
"Hi Strider! Thanks for your thoughtful message. It's always nice to get a refresher on the technical aspects, but I already know all this (been animating for 10+ years ;) Like I said in my post, I've already tried different combinations of…"
Feb 20
Strider replied to Tess Martin's discussion Can't get my lens to focus
"You need to learn how to adjust what's called Depth of Field.To do that you'll need to fiddle around with the aperture on the lens, it's the other ring, besides the focus ring (and the zoom ring if it has one, which your 28mm…"
Feb 20

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