Canon EOS M42 adapter problem

Attila · Expire: 2025-11-18

I got this mail from a customer who bought lenses from me. I don't have Canon EOS camera so I can't answer his question. Please answer to him.

Orio · Expire: 2012-12-04

Yes some adapters are correct others are not. But I am unable to tell which is good which is not because I don't remember where I bought this or that.

Anyway one must not be paranoid about it, and use the lens as is. Functionally nothing is compromised. If someone is so anal that he wants everything perfectly aligned etc. he should buy a Canon lens. When you get close to old lenses that were not designed for modern system, you need to be flexible in spirit. People who are afraid of the things not perfectly aligned by the millimeter should choose another hobby.

LucisPictor · Expire: 2013-12-03

I am not sure if I understand him correctly, but if I do, I would say this is "normal" for M42 adapters.
With some adapters you can see the aperture markings at the right position (top), with some they are somewhere at the side of the lens and with some they even are only visible if you turn the cam upside down.

Orio · Expire: 2012-12-04

Attila · Expire: 2025-11-18

Thank you!

Nelson · Posted: Sat Jan 12, 2008 11:56 am Post subject:

I am not sure to understand the problem ?

Do To the person ask if this is normal "the apertures values not in front of the "top" of the EOS ?"

If this is the question i answer, YES Smile

And it does not matter

LucisPictor · Expire: 2013-12-03

peterqd · Expire: 2014-01-04

I have 4 M42 > EOS adapters, 3 plain ones made of chrome-plated brass and a black anodised aluminium one with AF chip. They all function perfectly but only the black one lines up the lens correctly and I use it nearly all the time. I bought it from happypagehk

Orio · Expire: 2012-12-04

I am not much annoyed by the "lateral" adapters.
I am much more annoyed when you spend hundreds on an autofocus lens that is supposed to track moving objects quickly while in reality it misses focus soon and starts hunting between subject and the background - which is what at least 70% of autofocus lenses do, but it is verboten to say - may we never say that except for the most expensive professional lenses, the AF technology basically sucks.

Farside · Expire: 2013-12-27

It seems to be a common problem with M42/EOS adapters. No easy fix for it, either. Packing the thread would affect the register distance, so that's no good.
It all comes down to the maker not starting the thread at exactly the right spot.

patrickh · Expire: 2011-11-18

I have adapters for M42/Oly and M42/Nikon and both have the same problem - it works with some lenses and not others.

patrickh

F16SUNSHINE · Expire: 2011-11-18

My experience is varied. Currently I have only one m42 adapter it is from happypagehk. With pentax lenses the focus and aperture index is off center but not much. With Tomioka it is centered mostly. Others are all over the board some close to center some a bit off. I don't understand why it would make any difference Confused

? All of the bayonet mount adapters are fine.

Andy

Flor27 · Joined: 13 Sep 2007 Posts: 1195 Location: Paris, France

I have 3 kind of M42 to EOS adapters, all of them are 15� left aligned; I guess it's to facilitate the reading of the lens values with the protruding flash than most EOS cameras have.

hacksawbob · Joined: 28 Feb 2007 Posts: 1293 Location: LANCS UK

I have some lenses that sit different on the same adapter. not a big problem as focus and aperture are done by feel anyway. I have a recolection about super wides like the peleng not sitting straight that caused problems. Also you can mount the M42 adapter on each of the three flanges of the EF mount but two do not have a stop so they can fall off if twisted.