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Forum: Post Your Photos!
07-01-2013, 07:02 PM
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Forum: Troubleshooting and Beginner Help
02-27-2013, 06:51 PM
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I would really like a long lens for wildlife shots in the (Arizona) desert. While lusting for one of the Sigma 50-500mm units I purchased a Vivitar 1.4 teleconverter to use with my Sigma 70-300 lens.
Doesn't work very well. I noted when I mounted the TC and Sigma lens the screen on the K-30 started to flash. I knew I would have to go manual but even when set on M the flashing persisted.
I thought that outside I would have enough light for the autofocus to function. Nope. I was able to get a few decent pictures but with my (high mileage) eyesight and the shallow depth of field, more were blurs than crisp.
Any guidance? I thought maybe there might be a 250 or 300 mm prime lens that might allow the autofocus to work. But haven't found one yet.
(Plan B is to sell the TC, sell one of my other lenses and hope a bargain comes along on a 400-500 mm lens.)
jmb
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Forum: Photographic Technique
06-01-2009, 08:22 AM
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Although I can't recall losing anything because of a computer failure or related physical threat, I periodically recall our scramble to gather everything when a fire came right up to our driveway a few years ago.
The desktop is the prime storage
Several times a week I back up to an external drive and to a laptop
At least every month I update a second external drive and store it in a remote spot
Right now I am saving an email from Winzip that describes a promotion for their Carbonite remote storage. $50 per year seems like a low cost belt to go with my suspenders.
John Blair
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Forum: Pentax DSLR Discussion
05-31-2009, 06:47 PM
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Thanks for the confirmation of dust on the sensor. I suspected it was that but had no idea of the effectiveness of the dust removal. I suppose the offending stuff landed there during the past month as I have been creeping up on a lens/teleconverter combination. For the first year of ownership I probably changed the lenses five times. Fiddling with the lens/teleconverter combinations probably quadrupled that numberin the past two weeks.
Thanks . . . I will follow the least agressive approach suggested and get rid of the spot.
John Blair
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Forum: Pentax DSLR Discussion
05-31-2009, 03:07 PM
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Forum: Pentax DSLR Discussion
05-31-2009, 03:04 PM
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I have noticed during the past week or two that there is a spot showing up in the upper left quadrant of many of my images. Today I tested things a bit more thoroughly and concluded it is internal to the camera (k10d, 18 months old). The images shown in the link were taken with two different lenses. I have the dust removal set to activate at power on.
Any ideas as to the cause and cure?
Thanks,
John Blair
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