Why does nobody talk about the seeming fact on the internet, that T5/1200D cameras are ...

[szpevak]

Why does nobody talk about the seeming fact on the internet, that T5/1200D cameras are not compatible with any AF confirm M42 to Canon EOS adapters? What is the cause of that incompatibility? Does anyone know?

[Ray-uk]

For the people who are unfamiliar with focus confirm adaptors:

The adaptor is a normal mechanical adaptor that allows an old type manual lens ( the type that were used on old film cameras before AF) to be fitteed to a modern autofocus camera.

Some of these adaptors have built in AF confirm chip which connects with the camera lens mount electronics and fools it into thinking that there is an autofocus lens fitted that has been switched to manual focus.

This gives the added benefit that as you focus the lens manually (with the shutter button hafl pressed) the focus confirm indicator in the viewfinder will come on when the lens is in focus, the indicator is in the viewfinder only and does not show in live view. Sadly auto-confirm using the in camera indicator is not very accurate and can be unreliable with large aperture lenses.

All focusing and metering has to be done with the lens at full aperture so you you still have an entirely manual lens.

Some focus confirm adaptors are user-programmable so that you can (via multiple camera button presses) set maximum aperture of the lens ( to be recorded in EXIF) and carry out a crude type of in-lens microfocus adjust.

Whilst some of the older lenses are excellent ( some are even better than modern lenses) they can be slow and difficult to use on a modern camera even with the benefits that a chipped adaptor give you.

Ray

[TTMartin]

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@szpevak wrote:
Also, as far as I think, they are better for video making, since they are made for manual focusing, and exactly that is what you need for video. Also, they are much cheaper, and still they are very well built, and their price is not negligible in a country where people do not earn as much money, as in the USA.

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Ok, first and foremost. The T5/1200D doesn't offer any sort of phase detect autofocus during video even when using Canon lenses. It is simply not a feature of the camera. It only offers contrast detect focus during video. It will not give focus confirmation when using manual focus during video, because focus confirmation requires phase detect AF.

You best bet is to get Magic Lantern firmware (if it is available for your camera). Magic Lantern offers focus peaking which is what you want.

Otherwise you need to upgrade to a camera that has a dual-pixel AF sensor for continuous phase detect AF during video.

[ebiggs1]

szpevak wrote:

They are not lower quality.

Yeah, they are. 

Re-read these two sentences.  He is correct, believe me as I have adapted or tried to adapt a dozen or more and none have exceeded almost any newer current lens.  Certainly not the newest STM offerings.

"Because Canon offers STM lenses with such high quality low cost there is no reason to adapt old lower quality lenses."

"Sorry you are much better off not buying old lenses and adapters, and using STM lenses instead."

You can get them to work but they are not going to have better IQ.  Focus or no focus not withstanding.

[Waddizzle]

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@szpevak wrote:

Why does nobody talk about the seeming fact on the internet, that T5/1200D cameras are not compatible with any AF confirm M42 to Canon EOS adapters? What is the cause of that incompatibility? Does anyone know?

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I am not aware of any M42-to-EOS adapters that have focus confirmation.  In fact, I'm not aware of any T-Mount lenses that are auto-focus, none at all.  Maybe they do exist, but I'm not aware of any.  The lens are threaded, which means there is no space or accomodation for electrical contacts to communicate with the camera.

Did you have a specific adapter model and manufacturer in mind?