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Forum: Pentax SLR Lens Discussion 07-27-2016, 10:32 AM  
Help needed figuring out D FA 28-105
Posted By GEKarcz
Replies: 102
Views: 10,482
A federation can be activated in the K-1 through a firmware update???! This is even more of a beast than I thought!
Forum: Pentax SLR Lens Discussion 07-26-2016, 06:14 PM  
Help needed figuring out D FA 28-105
Posted By GEKarcz
Replies: 102
Views: 10,482
This may be an issue of shutter shock, given the OP's following statements: "Even with my perhaps too flimsy tripod the images are blurred at 1/90s and 1/125s. They are fine at 1/180s and higher." and the following:

"The exact amount of average blur ... has its maximum for shutter speeds of about 1/100s to 1/80s. It is less than 5 µm for 1/25s and slower. Or 1/250s and faster." From: LumoLabs: Shutter-induced blur with an SLR camera
Forum: Pentax K-70 & KF 07-25-2016, 01:38 PM  
K-70 preview with high ISO images (Japanese)
Posted By GEKarcz
Replies: 34
Views: 6,617
Seems that the Sigma 18-35mm f/1.8 DC HSM Art would pair quite well with the D-70, even if its range is relatively restricted (27-53mm in 35mm focal length) and it's not weather resistant.
Forum: Welcomes and Introductions 05-06-2016, 03:33 PM  
Hello - I have just bought the Pentax K1
Posted By GEKarcz
Replies: 12
Views: 1,236
Here's a list of Pentax K compatible lenses--sorted by focal length. Look over that the Max FLM column to see if a lens is for APS-C or Full-Frame.

Hope this helps!
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