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Forum: Lens Clubs 01-19-2024, 09:15 AM  
The A Club
Posted By Asahiflex
Replies: 3,996
Views: 622,318
I like my pictures simple and plain. :-)

SMC Pentax-A* 85mm f/1.4 (shot between f/2 and f/5.6)
Forum: General Talk 01-15-2024, 05:51 AM  
Your latest acquisition
Posted By Asahiflex
Replies: 27,110
Views: 2,080,744
I couldn't afford it when it was new, but now I can. The Pentax *ist D from 2003. Great little camera and I'll put to good use, with my Pentax AF-140c TTL ring flash! :cool:
Forum: Lens Clubs 12-25-2023, 05:38 AM  
Takumar club
Posted By Asahiflex
Replies: 18,987
Views: 3,712,368
100mm f/3.5 Takumar (Cooke Triplet)
Forum: Lens Clubs 12-24-2023, 08:16 AM  
300mm plus Lens Club: discuss your long lenses
Posted By Asahiflex
Replies: 40,768
Views: 4,310,288
No, I don't know. But I have checked out some photos of that breed and indeed - you must be right.
Forum: Lens Clubs 12-18-2023, 08:32 AM  
300mm plus Lens Club: discuss your long lenses
Posted By Asahiflex
Replies: 40,768
Views: 4,310,288
Someone's dog. DA 55-300 PLM at 300mm.
Forum: Pentax Forums Giveaways 12-10-2023, 12:08 PM  
November 2023 Pentax Limited Lens & Software Giveaway: Enter here!
Posted By Asahiflex
Replies: 1,988
Views: 31,004
I don't know how this works but here's my post. :lol:
Forum: Lens Sample Photo Archive 12-10-2023, 08:59 AM  
Pentax A* 85mm f/1.4 samples
Posted By Asahiflex
Replies: 86
Views: 11,256
Wide open with a very busy background.
Forum: Lens Sample Photo Archive 12-10-2023, 08:51 AM  
Pentax A* 85mm f/1.4 samples
Posted By Asahiflex
Replies: 86
Views: 11,256
And of course it rapidly gets even sharper when stopped down a little. This is at f/1.8.
Forum: Lens Sample Photo Archive 12-10-2023, 08:44 AM  
Pentax A* 85mm f/1.4 samples
Posted By Asahiflex
Replies: 86
Views: 11,256
Without a doubt, the A* 85mm f/1.4 is crazy sharp wide open... :eek:
It has its flaws of course...
Forum: General Talk 12-08-2023, 10:17 AM  
Your latest acquisition
Posted By Asahiflex
Replies: 27,110
Views: 2,080,744
This was a simple case of "buy first, think later" ;)
A small amount of dust inside, but who am I to complain?
Forum: Lens Clubs 12-03-2023, 08:49 AM  
The Sigma Lens Club- All lenses
Posted By Asahiflex
Replies: 3,219
Views: 497,015
Pentax K-3 II + Sigma AF Superwide II 24mm f/2.8





Forum: Pentax SLR Lens Discussion 12-03-2023, 03:52 AM  
Ikea Lamp and Takumar Lens
Posted By Asahiflex
Replies: 24
Views: 12,546
Interesting take. :)

But it doesn't matter to me as I have lots of other lenses with character. So to me this is not a "loss" at all.
Forum: Lens Clubs 12-01-2023, 07:44 AM  
Takumar club
Posted By Asahiflex
Replies: 18,987
Views: 3,712,368
Some real life shots with the 100mm f/3.5 Takumar from 1957. Although I added some contrast in post processing, it's actually way better than I thought it would be. That's not a real surprise because old triplets are usually fairly contrasty because of their lack of lens elements. :)











And yours truly with this lens in action... (no, I'm not the guy in my avatar because that's Jun Hirakawa, the legendary Pentax lens designer).

Forum: Pentax SLR Lens Discussion 12-01-2023, 02:18 AM  
Ikea Lamp and Takumar Lens
Posted By Asahiflex
Replies: 24
Views: 12,546
I tried the cheap IKEA Jansjö LED light (the weak USB version) to cure my yellowed 50mm f/1.4 Super-Multi-Coated Takumar. After 7 days of continuous exposure of the lens, which sits on a mirror, this is the result. It's still a bit yellow (slightly more than the photo shows, my 8 element 50mm f/1.4 Takumar does not show a cast). Maybe I should give it another week... :-)

I noticed that the yellowing was cloudy / uneven in the middle. The discoloration is now pretty evenly.

Before:


After 7 days:


The cure in progress:
Forum: Lens Clubs 11-28-2023, 08:21 AM  
Takumar club
Posted By Asahiflex
Replies: 18,987
Views: 3,712,368
It all depends on the subject. Here's another quick snap with the 100mm f/3.5 Takumar, wide open.

Forum: Lens Clubs 11-27-2023, 12:03 PM  
Takumar club
Posted By Asahiflex
Replies: 18,987
Views: 3,712,368
Some test shots with Asahi's oldest tele lens: the three-element 100mm f/3.5 Takumar from 1957.

The first one was shot wide open, the 2nd at f/5.6 and the last one at f/8. The softness and glow wide open is quite obvious. I think these results show why this lens was quickly replaced with the four-element 105mm f/2.8 Takumar.

I also wanted to know the difference with the 100mm f/2.8 Meyer Trioplan, which is also a triplet, but the bubble bokeh of the Asahi is certainly not "distracting". The Trioplan bokeh has strong outlines. The Takumar- almost none at all.

(Never mind the condition of the Kodak Retina. Being inoperable, It's always sitting on my dusty bookshelf.)

Wide open (f/3.5)


f/5.6


f/8
Forum: Pentax SLR Lens Discussion 11-25-2023, 02:42 AM  
Rare 100mm f/3.5 Takumar is a dud. :-(
Posted By Asahiflex
Replies: 15
Views: 1,022
Thanks to several people on this forum and facebook I finally got the courage to repair the 100mm f/3.5 Takumar. It appears that the whole optical block (including diaphragm) can easily be separated from the focusing helicoid just by unscrewing one retaining ring from the back side of the lens (warning: it's not the ring visible in the photo!). Also nice to see how the lens was shimmed for infinity (with several thin brass slotted rings).

The problem? I noticed that the last element (camera side) came out of the lens tube with the flatter side pointing to the rear, and that's not what the optical diagram shows. This problem is impossible to see without removing the element, because it's lying very deep. With the optical block out of the helicoid things became much easier. So finally I flipped that element (most curved side pointing to the M42 mount side) and screwed everything back together. Lo and behold - it's OK again!

Now let's wait for better weather because the last shots could be so much better with nicer light. The last two photos were taken with the 100mm Takumar.











Forum: Pentax SLR Lens Discussion 11-22-2023, 05:19 AM  
Rare 100mm f/3.5 Takumar is a dud. :-(
Posted By Asahiflex
Replies: 15
Views: 1,022
I do have such a set of (massive) rubber lens rings, so rest assured: I will do everything I can to not destroy anything :lol:

Not the best of photos, but the rear element at least is visible (close to the diaphragm).

Forum: Pentax SLR Lens Discussion 11-21-2023, 11:20 AM  
Rare 100mm f/3.5 Takumar is a dud. :-(
Posted By Asahiflex
Replies: 15
Views: 1,022
Thanks, that would be good news because the lens, other than that, is in a very good condition. But a bit of service is definitely in order for such a nearly 70 years old lens, it seems. :-)
Forum: Pentax SLR Lens Discussion 11-21-2023, 10:51 AM  
Rare 100mm f/3.5 Takumar is a dud. :-(
Posted By Asahiflex
Replies: 15
Views: 1,022
My rare 100mm f/3.5 Takumar arrived!

Unfortunately, it seems to be a dud. It was either serviced with one of the elements flipped, or one of the elements is missing. I don't know yet. The number of reflections seem to be ok for a triplet though (two in the front, then the diaphragm, one in the back). Is that the correct order? With the diaphragm open I see a total of 6 reflections. When closed then there are 4. I think the middle element is flipped.

BTW, I can't return it. I don't even want to because it was cheap enough.



Forum: Lens Clubs 11-17-2023, 09:59 AM  
Takumar club
Posted By Asahiflex
Replies: 18,987
Views: 3,712,368
Auto-Takumar 1:2 f=55mm no. 224154 from around 1960.



Forum: Pentax SLR Lens Discussion 11-17-2023, 09:45 AM  
Super Takumar 35mm 3.5 m42 trouble lenses
Posted By Asahiflex
Replies: 27
Views: 736
The samples in the first post are contrasty enough that haze and fungus are definitely not the problem.

Given the nature of the lens, and the fact that some parts of the 2nd photo are sharp, I think that it's simply difficult to focus (not defective).
Forum: Pentax News and Rumors 11-15-2023, 03:11 AM  
A new Pentax camera at last (or is it?): Pentax WG-90
Posted By Asahiflex
Replies: 161
Views: 10,277
I have never been thrilled with the IQ of Pentax digital compacts. Will this WG-90 be any different?
Forum: Site Suggestions and Help 11-13-2023, 11:57 PM  
Question Pinch & Zoom on mobile?
Posted By Asahiflex
Replies: 3
Views: 379
Thanks Adam! Now pinch & zoom definitely works on Chrome mobile! :cool: :)
Forum: Site Suggestions and Help 11-13-2023, 07:40 AM  
Question Pinch & Zoom on mobile?
Posted By Asahiflex
Replies: 3
Views: 379
I like this forum a lot, but I'd also like to be able to zoom in on photos or other parts of the site when I'm viewing the site on mobile. Right now, this is impossible on my Samsung S23 in Chrome. Can this be changed? I thought pinch & zoom is enabled by default in all major browsers. I know of no other sites right now where pinch & zoom is forbidden on mobile. :-)

Swiching my mobile browser to "desktop mode" solves this somewhat, but then all text is unreadable.
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