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Fastest macro on earth: Porst Color Reflex MCM 55mm F1.7
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PostPosted: Mon Dec 16, 2024 7:39 pm    Post subject: Reply with quote
caspert79 wrote:
Those are nice images for sure, but in terms of image quality they look just like a pretty average standard lens with close focusing ability IMO. Prices on Ebay are quite wild, in the same territory as some of the Olympus Zuiko OM 50/2 macro's (which is a real macro and fast as well).


With patience a ZF Makro Planar 50/2 should not be far either.

ZF prices have been going down steadily after Nikon stopped making new cameras with F Mount.


PostPosted: Mon Dec 16, 2024 7:56 pm    Post subject: Reply with quote
pabeu wrote:
caspert79 wrote:
Those are nice images for sure, but in terms of image quality they look just like a pretty average standard lens with close focusing ability IMO. Prices on Ebay are quite wild, in the same territory as some of the Olympus Zuiko OM 50/2 macro's (which is a real macro and fast as well).


With patience a ZF Makro Planar 50/2 should not be far either.

ZF prices have been going down steadily after Nikon stopped making new cameras with F Mount.


Yeah, the 100/2 makro planars are often not too expensive either.


PostPosted: Tue Dec 17, 2024 1:36 am    Post subject: Reply with quote
These Chinon lenses have pretty standard construction. remove the front with a rubber tool, and the lens cells/elements with pin spanners. Nearly all examples are going to have oily blades (hence the stuck aperture). Removal of the rear mout varies depending on whether this is the straight-barreled or tapered version.

siudym wrote:
I would like to try cleaning the lenses - please give me some tips on how to disassemble this lens safely.


Last edited by BrianSVP on Tue Dec 17, 2024 1:37 am; edited 1 time in total


PostPosted: Tue Dec 17, 2024 1:37 am    Post subject: Reply with quote
Deleted dupe message.


PostPosted: Tue Dec 17, 2024 8:58 am    Post subject: Reply with quote
As everybody seems to adverize their own verions of fast macros I should perhaps point out that Kern Aarau made the Alpa Macro Switars in two vrsions, f. 1,8 and f,1,9 with slightly different constructions before they gave up and shipped less than 100 lens blocks to Japan for mounting in m42-thread mount helixes there. Those have rear elements that will collide with the mirror of ordinary M42 cameras.

p.


PostPosted: Tue Dec 17, 2024 9:37 am    Post subject: Reply with quote
Hey, my JML 56 mm f/1.2 wants to enter this competition as well!

The complexity of simple things by simple.joy, on Flickr

Colory intake by simple.joy, on Flickr

Defying the bleakness by simple.joy, on Flickr

Don’t cast your pearls before swine by simple.joy, on Flickr

Paper flow by simple.joy, on Flickr

It might not be fully sharp at f/1.2 but at f/1.7 it feels perfectly comfortable already!


PostPosted: Tue Dec 17, 2024 10:00 am    Post subject: Reply with quote
simple.joy wrote:
Hey, my JML 56 mm f/1.2 wants to enter this competition as well!

The complexity of simple things by simple.joy, on Flickr

Colory intake by simple.joy, on Flickr

Defying the bleakness by simple.joy, on Flickr

Don’t cast your pearls before swine by simple.joy, on Flickr

Paper flow by simple.joy, on Flickr

It might not be fully sharp at f/1.2 but at f/1.7 it feels perfectly comfortable already!


Stunning results !


PostPosted: Wed Dec 18, 2024 12:57 am    Post subject: Reply with quote
I mean, these are great photos, but doesn't this lens kinda stretch the bounds of what we're discussing here? Wasn't this a shutter-mounted fixed-focus dedicated CRT lens with no helical and using specialized cameras? The Repro Nikkors at least were meant to be mounted on standard 35mm F mount cameras, even if they didn't have helicals.

simple.joy wrote:
Hey, my JML 56 mm f/1.2 wants to enter this competition as well!

The complexity of simple things by simple.joy, on Flickr

Colory intake by simple.joy, on Flickr

Defying the bleakness by simple.joy, on Flickr

Don’t cast your pearls before swine by simple.joy, on Flickr

Paper flow by simple.joy, on Flickr

It might not be fully sharp at f/1.2 but at f/1.7 it feels perfectly comfortable already!


PostPosted: Wed Dec 18, 2024 8:13 am    Post subject: Reply with quote
BrianSVP wrote:
I mean, these are great photos, but doesn't this lens kinda stretch the bounds of what we're discussing here? Wasn't this a shutter-mounted fixed-focus dedicated CRT lens with no helical and using specialized cameras? The Repro Nikkors at least were meant to be mounted on standard 35mm F mount cameras, even if they didn't have helicals.



Thank you! I have to admit that I'm not really familiar with either of the two lenses' original mounting solutions or cameras, so I just assumed the JML lens was used with some standard Polaroid close-up camera. Of course you've got a point when it comes to the original intention of the lens. That being said the standard M39 thread of the JML 56 mm lens likely enables it to be mounted onto most cameras with ease, while the (whatever that) thread on the Repro-Nikkor ist, plus its big diameter can pose a real challenge. Of course neither is a regular taking lens, so the Porst, Chinon & Alpa lenses can keep their titles.

At the end of the day I don't care about original designation though, and so I think it's often worth looking into lenses from industrial applications as alternatives.


PostPosted: Fri Jan 10, 2025 9:49 am    Post subject: Reply with quote
I cleaned up the edges of the rear lens and I think it did a pretty good job. The problem is that I didn't remember the position Smile Is the flat side on the inside of the lens and the curved side on the outside?

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PostPosted: Fri Jan 10, 2025 11:12 am    Post subject: Reply with quote
Most ~50mm lenses curve outward with the rear element, if the rear element has a curve that is, quite a few also appear flat. A notable exception is the Konica 50/1.4 which curves inward. However, I don't have direct information for the lens. Try it each way and do some tests, it hopefully would be obvious, as that is a reasonable curvature.


PostPosted: Fri Jan 10, 2025 8:03 pm    Post subject: Reply with quote
While access to the rear element is easy, the front one has a sleeve (thread) that has been additionally filled in two places with black glue... I used a lot of force but I can't unscrew it. The aperture is there, it works, but with considerable resistance (oiled).

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