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Forum: Troubleshooting and Beginner Help
01-17-2014, 09:29 PM
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Thank you all for the great leads and other replies! This sounds like a very solvable problem.
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Forum: Troubleshooting and Beginner Help
01-17-2014, 10:09 AM
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Hello Pentaxians,
I'm considering buying a Pentax-M lens, but it is missing the white plastic bump on its lens barrel. I have found that these are quite useful for gripping the lens when installing or removing it from a mount.
This photo shows the bump here in case my description is not clear (the one in this photo is yellowish):
http://lh4.ggpht.com/_bmjYBbtGtuA/S1zrCFbfBLI/AAAAAAAABKU/YVzlVRcaJP4/s800/IMGQ6120.jpg
Does anybody know of a source for obtaining replacement bumps - original Pentax items or something similar?
Cheers,
Tom
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Forum: Digital Processing, Software, and Printing
01-05-2008, 11:27 PM
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Yes - I have had the same problem. Last summer I shot about 2000 frames in Tanzania (all compressed .PEF on my K10D), and Lightroom v1.1 would not import about 5 of them. They were all imported fine with either the Pentax software or GraphicConverter (a Mac program).
I read elsewhere that this was a known bug (but I forget where I read this - likely dpreview).
-Tom
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Forum: Pentax DSLR Discussion
03-17-2007, 10:55 AM
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This is a nice idea, but there are some devilish details. In addition to the sensor, you'd also need to replace the clocking & drive electronics. New sensors will be of a different pixel format (bigger), so they'll need different drive electronics. They may also need different preamps and A/D circuits (e.g. the K10D PRIME chip).
Much more than the sensor is replaced when the Hubble is repaired. Entire instruments consisting of new optics, electronics, software, and mechanical structures are swapped in and out. Think of the Hubble telescope as a BIG lens (57.6 m focal length, 2.4 m diameter) that has different camera systems (bodies plus teleconverters) attached to it.
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Forum: Photographic Technique
01-18-2007, 10:38 PM
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Hmmm.... I didn't realize that Aperture supported the K10D (or K100D).
I thought that it just supported the D, DS, DL.
Are you pulling any tricks to get aperture to read your RAW files, or is this
JPEG? Perhaps this will be fixed if / when Aperture supports K10D RAW.
-Tom
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Forum: Pentax SLR Lens Discussion
01-10-2007, 10:55 PM
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That is q very impressive photo!
By the way, does the Tamron converter report the correct focal lengrh and f/#
to the camera (as seen in the EXIF data), or does it pass the lens info
straight through? Getting the right focal length is probably important for
shake reduction to work well.
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Forum: Pentax SLR Lens Discussion
01-09-2007, 08:23 AM
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I'd still be interested in more comments on 2x teleconverters.
I realize that the 1.4X ones will give better IQ and faster f/#, but I am in a
situation where I need the longer reach of a 2X TC. My longest good lens
is a Tokina 80-200 AT-X pro f/2.8 zoom (I'm lucky to have it), and I'm planning
to photograph wildlife in Africa this summer (lucky me!).
I'd really like to have a 400mm focal length, and I was wondering about using
a 2X TC on the Tokina. That would reduce the weight and bulk of carrying
another lens as well as the cost / availability issue as well.
Any comments on how well a 2X TC might work with this lens, and any
recommendations for which one to get? I noticed that there is a 4 element
one (Kenko / Tamron, like the 1.4X job) as well as a 7 element one (Kenko).
I've also seen a used 7 element one that is AF but not the latest "DG" version.
Any comments on whether the "DG" designation is a real perfoemance
advantage?
I recently got a Sigma 400mm AF lens (cheap - non-APO) to start taking wildlife
photographs and its contrast and chromatic aberration is unacceptable in a
lot of lighting conditions; I'd like to to better with the Tokina zoom
plus 2X TC. Am I dreaming, or is this realistic?
Any comments much appreciated!
Thanks,
Tom (1st post here, I think)
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