July 2021 Part 1 — This Month Through Your Adapted Lens

Started 4 months ago | Discussions thread
Travis Butler
Travis Butler Senior Member • Posts: 1,627
Re: Mamiya-Sekor 55mm f/1.4 at infinity

Albert Silver wrote:

So I stuck mine on an old Canon 650D (crop sensor), which has infinity focus, and noticed a curious thing: if I dial the focus to the limit where infinity should be, it is softer than set just before. This is true of all infinity attempts. I am attaching two images taken from my window illustrating:

I noticed the same thing on mine. Usually infinity focus is an issue with the adapter being just a little bit too short; since mirrorless gives you good focusing aids, I usually prefer to just deal with it instead of messing around with shimming.

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Flickr at https://www.flickr.com/photos/the_prof67/ Warning: Heavy Learning in progress.

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