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12-16-2014, 01:02 PM   #1
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Scared to use Helios M42 Lens - Help!

Hi, i have a pentax M42 to K adapter and a Helios 44M2 58mm lens
There is an aperture pin that does not depress and im scared to mount it on my K5IIs.
Would it be dangerous to have it damage my camera?

12-16-2014, 01:13 PM   #2
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QuoteOriginally posted by Rampage2k5 Quote
Would it be dangerous to have it damage my camera?
The aperture actuator pin poses the same hazard to your K-mount camera as the same pin on most other M42 lenses. That would be none. Your main issue will probably be that only one Helios 44 variant having the pin also has the Auto/Manual switch on the side that allows for manual aperture operation. You may be looking at having to disable the pin in order to stop the lens down. There are instructions on the Web.


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12-16-2014, 01:16 PM   #3
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QuoteOriginally posted by Rampage2k5 Quote
Helios 44M2
BTW...what is a Helios 44M2? I am pretty familiar with the Helios 44 variants, but have never heard of that one.


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12-16-2014, 01:18 PM   #4
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It should be no problem as there is plenty of clearance for the aperture pin on screwmount lenses. The aperture pin was used on 35mm SLRs to begin with and the M42 K-mount adapter was designed for film cameras.

There are some screwmount lenses with protruding rear elements that could only be used in mirror lockup mode that should be avoided.

12-16-2014, 01:46 PM   #5
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QuoteOriginally posted by stevebrot Quote
BTW...what is a Helios 44M2? I am pretty familiar with the Helios 44 variants, but have never heard of that one.


Steve
maybe he just meant M42?
12-16-2014, 01:49 PM   #6
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You should have no problem using it on k-5IIs with a m42 to k-mount adapter..
12-16-2014, 01:51 PM   #7
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QuoteOriginally posted by Not a Number Quote
There are some screwmount lenses with protruding rear elements that could only be used in mirror lockup mode that should be avoided.
???

I know there are often issues with Canon FF, but I am not aware of any clearance problems with APS-C K-mount cameras. What lenses were you thinking of?


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12-16-2014, 01:52 PM   #8
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QuoteOriginally posted by LensBeginner Quote
maybe he just meant M42?
That is what I thought, but there is no harm in asking. It would not surprise me to see yet another Helios 44 variant come to light.


Steve

12-16-2014, 02:02 PM   #9
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QuoteOriginally posted by stevebrot Quote
I know there are often issues with Canon FF, but I am not aware of any clearance problems with APS-C K-mount cameras. What lenses were you thinking of?
My bad, I was thinking of some of the Nikon fish-eyes which aren't even screwmount. Chalk it up to a senior moment or CRS (Can't Remember S---).
12-16-2014, 02:04 PM   #10
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QuoteOriginally posted by stevebrot Quote
That is what I thought, but there is no harm in asking. It would not surprise me to see yet another Helios 44 variant come to light.

Steve
You talk like an entomologist! I like it!
12-16-2014, 02:16 PM   #11
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QuoteOriginally posted by LensBeginner Quote
You talk like an entomologist! I like it!
Hmmmm...I was a marine botanist in another life and I guess some of the language stuck.


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12-16-2014, 04:46 PM   #12
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QuoteOriginally posted by stevebrot Quote
???

I know there are often issues with Canon FF, but I am not aware of any clearance problems with APS-C K-mount cameras. What lenses were you thinking of?


Steve
I believe the (ISCO-Göttingen) Berolina Westromat 35mm f2.8 manages to hit them at infinity.. At least I've read so somewhere.
If someone knows for sure that it doesn't I'd go and pick one up..
12-16-2014, 06:20 PM   #13
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QuoteOriginally posted by Topsy Quote
I believe the (ISCO-Göttingen) Berolina Westromat 35mm f2.8 manages to hit them at infinity..
On APS-C? I did the Google search and found a reference on the MF forums regarding that lens. There were several posts (including a few from users on this site) indicating mirror interference on several recent Pentax dSLRs. I find this amazing since the Westromat was designed for 35mm film. I would be curious as to what film cameras that lens worked with.


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12-16-2014, 08:17 PM   #14
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I meant the 58mm 44M2 helios lens.
Thats what i find it as on google as well hehe.

Thanks for all the imput guys, really appreciated.
12-16-2014, 08:40 PM   #15
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QuoteOriginally posted by Rampage2k5 Quote
I meant the 58mm 44M2 helios lens.
Thats what i find it as on google as well hehe.

Thanks for all the imput guys, really appreciated.
Still have never heard of it. The Helios 44, Helios 44-2 and Helios 44-3 are pre-set lenses.

The Helios 44m was the first auto aperture version, it had an A/M switch. Then came the 44m-4, 44m-5, 44m-6 etc. The later versions have no A/M switch.

Helios 44 M42 Lenses | Pixelfarmize
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