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12-15-2018, 01:17 PM   #676
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QuoteOriginally posted by Cabessius Quote
Complete list of Helios lenses - getting closer
Thanks! I remember when no-X started his project but have not been back there for awhile. I did not know that he had the resolution numbers for the 44-3, but now I do. I noticed that you were a participant on that thread.

QuoteOriginally posted by Cabessius Quote
But if you are interested in a side by side comparison between any Helios 44 versions just let me know. I have most of them.
Thanks, I will remember that.


Steve

12-16-2018, 02:06 AM - 1 Like   #677
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QuoteOriginally posted by stevebrot Quote
Now you tell us! So what about the Helios-3 you asked about?
Just kidding.
I am the master of typos
This was not embarrassing, I have done much worse other times...
Of course I meant 44-3.
I think the Helios 3 is one of those rare soviet lenses that are game for hard core collectors. Not totally sure though. If I'm wrong, I will stand corrected very soon

---------- Post added 16-12-18 at 11:19 AM ----------

QuoteOriginally posted by stevebrot Quote
Thanks! I remember when no-X started his project but have not been back there for awhile. I did not know that he had the resolution numbers for the 44-3, but now I do.
The resolution figures for most (all?) soviet lenses should be available from the GOI site or sovietcams.com.
There are optical designs cut-outs and the original sheets of the various optics, even the uncommon ones.
The values of resolution for center/borders are much lower than what you'd expect, because they were neither theoretical nor measured on the aerial image. They used cheap soviet film instead.
On a good modern sensor the number of lines/mm that the lens can discriminate would be higher.

EDIT:
couldn't find the GOI site, I don't even know if it's still online.
This page The 6x9 Photography Online Resource - Files has a link to a huge 1963 GOI catalog with all the info you might ask for.
The PDF version is 141Mb
12-16-2018, 09:37 AM   #678
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QuoteOriginally posted by cyberjunkie Quote
The resolution figures for most (all?) soviet lenses should be available from the GOI site or sovietcams.com.
Sovietcams.com is hit or miss and the GOI site is MIA. IIRC, the zenitcamera site used to have photocopied archives of technical stuff as well as extensive product listings, but those seem to have disappeared as well.

QuoteOriginally posted by cyberjunkie Quote
The values of resolution for center/borders are much lower than what you'd expect, because they were neither theoretical nor measured on the aerial image. They used cheap soviet film instead.
That was my understanding as well. There is a note on Helios 44 page at zenitcamera.com with an "experimental" test using higher resolution film that gives somewhat higher numbers ("Resolution (0/10/20 mm ) : 46/33/26 lines / mm", LINK)

QuoteOriginally posted by cyberjunkie Quote
couldn't find the GOI site, I don't even know if it's still online.
This page The 6x9 Photography Online Resource - Files has a link to a huge 1963 GOI catalog with all the info you might ask for.
Thanks...this should keep me busy for awhile, particularly since I can barely transliterate Cyrillic, much less read Russian.


Steve
12-16-2018, 09:43 AM   #679
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I think I'm going to pick one of these up. So do some of them have a Ricoh pin then? I thought all variants were all m42 mounts?

12-16-2018, 11:08 AM   #680
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QuoteOriginally posted by stillshot2 Quote
I think I'm going to pick one of these up. So do some of them have a Ricoh pin then? I thought all variants were all m42 mounts?
AFAIK there is only one PK version. No Ricoh pin or any other inconvenience.
All the others are either M42 or M39 (not the Leica standard, register is almost identical to M42 lenses).
12-16-2018, 11:30 AM   #681
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QuoteOriginally posted by stillshot2 Quote
I think I'm going to pick one of these up. So do some of them have a Ricoh pin then? I thought all variants were all m42 mounts?
Nope, no Ricoh pin! The Helios 44K-4 is standard Pentax K. Those variants with an "M" in the name are M42 with a metal aperture actuator pin on the lens rear; of those only the Helios 44M has an auto/manual switch. All other common variants (44, 44-2, 44-3) have a preset aperture mechanism and are M42, with the exception of the Helios 44 with M39 (Zenit) mount.


Steve
12-16-2018, 12:58 PM   #682
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QuoteOriginally posted by stevebrot Quote
Nope, no Ricoh pin! The Helios 44K-4 is standard Pentax K. Those variants with an "M" in the name are M42 with a metal aperture actuator pin on the lens rear; of those only the Helios 44M has an auto/manual switch. All other common variants (44, 44-2, 44-3) have a preset aperture mechanism and are M42, with the exception of the Helios 44 with M39 (Zenit) mount.


Steve
My 44M-4 does not have an auto/manual switch it is always auto it is an 84xxxx ?
12-16-2018, 01:01 PM   #683
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QuoteOriginally posted by Xmas Quote
My 44M-4 does not have an auto/manual switch it is always auto it is an 84xxxx ?
Yes, that is true. The 44M is the only auto-aperture version that has the A/M switch. Unless someone has done a surgical conversion, your lens will stay wide open at all aperture settings unless the pin on the back is depressed.


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12-16-2018, 01:41 PM   #684
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QuoteOriginally posted by stevebrot Quote
Yes, that is true. The 44M is the only auto-aperture version that has the A/M switch. Unless someone has done a surgical conversion, your lens will stay wide open at all aperture settings unless the pin on the back is depressed.


Steve
Sorry for missunderstanding and thanks for information! I can see the problem with K mount conversion as mine lives on a small button Spotmatic!
12-16-2018, 01:45 PM   #685
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QuoteOriginally posted by cyberjunkie Quote
AFAIK there is only one PK version. No Ricoh pin or any other inconvenience.
All the others are either M42 or M39 (not the Leica standard, register is almost identical to M42 lenses).
QuoteOriginally posted by stevebrot Quote
Nope, no Ricoh pin! The Helios 44K-4 is standard Pentax K.
Thanks guys you all know so much!
12-17-2018, 12:33 PM - 2 Likes   #686
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QuoteOriginally posted by stevebrot Quote
The Helios 44K-4 is standard Pentax K.
Here's mine mounted on my K-50:

03-13-2019, 07:07 AM   #687
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No bokeh, but a simple example of the 44K-4...
03-13-2019, 09:24 AM   #688
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QuoteOriginally posted by stevebrot Quote
Sovietcams.com is hit or miss and the GOI site is MIA. IIRC, the zenitcamera site used to have photocopied archives of technical stuff as well as extensive product listings, but those seem to have disappeared as well.



That was my understanding as well. There is a note on Helios 44 page at zenitcamera.com with an "experimental" test using higher resolution film that gives somewhat higher numbers ("Resolution (0/10/20 mm ) : 46/33/26 lines / mm", LINK)



Thanks...this should keep me busy for awhile, particularly since I can barely transliterate Cyrillic, much less read Russian.


Steve
I can be a volunteer Cyrillic reader if Google translate doesn't make sense

by the way: here is another good source of information which you can sort by column. Also in Russian though.
03-14-2019, 08:46 PM - 2 Likes   #689
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Helios 44K-4 58/2 on K-50

03-21-2019, 01:36 PM - 4 Likes   #690
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Early all-black Helios 44

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