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Forum: Pentax SLR Lens Discussion 01-09-2017, 04:22 AM  
DA* 60-250 mod for FF
Posted By Cyril_K5
Replies: 293
Views: 82,562
Where are you based? I would be very interested by your services
Forum: Pentax SLR Lens Discussion 10-01-2016, 04:22 AM  
DA* 60-250 mod for FF
Posted By Cyril_K5
Replies: 293
Views: 82,562
Thanks a lot mate. I just did the modifications as you suggested step by step. Worked like a charm for me ;-)


---------- Post added 10-01-16 at 01:14 PM ----------


Thanks mate. Mine worked too but I kept the original baffle (cardboard and black flocking material for telescopes).

I did a few tests and I noticed something strange with my K-1. When I zooming in the longest range and I shut the aperture to say f/9 in Av mode, I get an overexposed picture of about 2 stops. Not sure if it is the modification but it is something I never noticed before.

*** Edited message ***
Found the culprit. It was my "Cardboard baffle" that was a tad too wide and was exercising some pressure on the aperture mechanism and preventing the lens from shutting the aperture. I have fixed it now and it works.

Lesson learned: if you choose to go for the homemade baffle vs dremmeled one, make sure you measure it to the millimeter and test that the mechanism is still working inside the lens.
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