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Forum: Troubleshooting and Beginner Help
12-03-2019, 06:37 AM
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Hi
I have converted a Prakticar 2,8/135 MC with Praktica B mount to Pentax K. Check here http://percipa.com/foto/DIY objektiv/Prakticar 2,8:135/Prakticar 2,8_135 MC.html
I do not know if it is possible to convert your Sigma. Probably it wold work as long as you can adjust infinity with the focusing ring. There is a difference in the flange distance. The optics must com closer to the sensor.
Livio
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Forum: Digital Processing, Software, and Printing
10-09-2019, 06:39 AM
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For my K-1 I always use Digital Camera Utility for RAW and do the rest in Affinity Photo. If you donīt like Digital Camera Utility I would recommend Rawtherapee and Darktable. You can also "develop" RAW i Affinity.
Affinity is a very capable software at a good price.
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Forum: Pentax SLR Lens Discussion
11-11-2018, 12:34 PM
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Ha ha ha, he is a real comedian. He is so crazy about having this lens so he does not know whether to cry or laugh.:lol::lol:
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Forum: Monthly Photo Contests
10-14-2018, 07:12 AM
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Mirrored small rock in a puddle
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Forum: Pentax SLR Lens Discussion
09-16-2018, 01:27 PM
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Hi
If you want a small lens, the FA 50mm F1.4 is a cheap and good option. If you work over F2.8 you can get very good results. It's old and also a bit slow in focus.
Everything depends on how you intend to use the lens. There is better lenses with a little longer focal length if it is intended for portrait photography or macro.
Below some examples of what to expect from the old FA 50/1.4.
The first two pictures are at f4. No 2 is 200% crop from the lower feft side.
No 3 and 4 are at f8. No 4 is 200% crop. I used K-1. The post prosessing and sharpening was made in Digital camera utility 5.
I have no experience of the other lenses raised here in the thread.
Good luck with your search for a fixed focal lens.
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Forum: Monthly Photo Contests
09-16-2018, 10:56 AM
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Sunset in January over Gothenburg archipelago.
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Forum: Pentax Forums Giveaways
06-30-2018, 04:02 AM
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Hi
This afternoon i will photograph with B/W film.
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Forum: Post Your Photos!
06-28-2018, 12:52 PM
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Really nice blue tones.
I like the picture.
Livio
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Forum: Welcomes and Introductions
06-28-2018, 08:06 AM
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Hi
Sorry. I do not know why the link is broken. Try to copy and past this http://percipa.com/foto/DIY objektiv.html
including objektiv.html
Added a album in my profile.
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Forum: Welcomes and Introductions
06-27-2018, 03:26 AM
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Hi
Old K-mount user from the film era. Finaly I now use a good digital camera - Pentax K-1. I prior used Chinon cameras for film and I still use Chinon for B/W film.
I do like to do some changes to lenses. I changed Prakticar 2,8/135 MC Pentacon B-mount to K-mount. You can read the instructions here http://percipa.com/foto/DIY objektiv/Prakticar 2,8:135/Prakticar 2,8_135 MC.html
I will later add how to easy rebuild Carl Zeiss Planar 1,7/50 T*.
Livio
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