All Forum Comments
Comment by Mannesty posted on SMC A 50mm f1.2 at 16/07/2007 - 23:06
George,
I made the comparison above mostly to help talk myself out of changing my K version 1:1.2 for the A version.
I'm not so sure I've convinced myself yet .
I've been duplicating some of the tests that others have already made re. exposure issues with manual lenses on the K10D and I've been equally disappointed with the results.
I have only two pre-A series primes, the K 50mm 1:1.2 & M 400mm 1:5.6 and I don't really want to change them. I just hope that Pentax gets enough flack about this issue that they do something about it and fix it soon.
Regards,
I made the comparison above mostly to help talk myself out of changing my K version 1:1.2 for the A version.
I'm not so sure I've convinced myself yet .
I've been duplicating some of the tests that others have already made re. exposure issues with manual lenses on the K10D and I've been equally disappointed with the results.
I have only two pre-A series primes, the K 50mm 1:1.2 & M 400mm 1:5.6 and I don't really want to change them. I just hope that Pentax gets enough flack about this issue that they do something about it and fix it soon.
Regards,
Comment by Mannesty posted on SMC A 50mm f1.2 at 16/07/2007 - 22:43
And . . . the SMCP-A 50mm 1:1.2 is manual focus and only 1/2 stop faster than the SMCP-FA 50mm 1:1.4 . . . which is auto focus and half the price of the 1:1.2 from SRS Microsystems (if they still have any).
Is it really worth the money?
The FA 1:1.4 . . . most definitely is. I'm not so sure about the A 1:1.2 . . . and it's much heavier.
Is it really worth the money?
The FA 1:1.4 . . . most definitely is. I'm not so sure about the A 1:1.2 . . . and it's much heavier.
Comment by Mannesty posted on SMC A 50mm f1.2 at 16/07/2007 - 21:34
Quote:
EDIT: Stopping to think about it, it gives a shorter curtain travel and so a higher flash sync speed.
Haven't vertical run focal plane shutters been commonplace in film cameras for years? I think my Super-A had one, 1983 vintage.Tyr wrote:
Shutter is electro-mechanical with a 1/180 maximum speed on the K10D. Higher speeds are achieved by a slot streak exposure mechanism with the first and second curtain as far as I understood it.
As I understand it the curtains moved from side to side on my old K1000 so that they could be set by the film advance. On the K10D I was playing with a flashgun and higher shutter speeds and the properly exposed area made it look like the curtains travelled vertically, without the need to link to film advance is a vertical shutter a better solution?Shutter is electro-mechanical with a 1/180 maximum speed on the K10D. Higher speeds are achieved by a slot streak exposure mechanism with the first and second curtain as far as I understood it.
EDIT: Stopping to think about it, it gives a shorter curtain travel and so a higher flash sync speed.
Comment by Mannesty posted on straining the "motor" on the k10d at 12/07/2007 - 22:45
Thanks for the enlightenment chaps. Nice to learn something new.
So if we use the mirror lockup with no lens fitted, we should see the shutter closed (no visible CCD) to start with?
I always thought that the reason a DSLR can't produce a 'live' view like a compact, was because the mirror prevents light reaching the CCD until it's raised.
So if we use the mirror lockup with no lens fitted, we should see the shutter closed (no visible CCD) to start with?
I always thought that the reason a DSLR can't produce a 'live' view like a compact, was because the mirror prevents light reaching the CCD until it's raised.
Comment by Mannesty posted on straining the "motor" on the k10d at 12/07/2007 - 22:42
This is intersting because . . . I don't believe that DSLR's actually have a shutter. Not a mechanical one anyway.
Mirror movement yes, shutter, I don't think so. Surely the 'shutter' function is purely electronic sampling of the sensor. There is certainly nothing like the normal film type leading/trailing curtain arrangement inside my camera, not that I can see anyway.
Does anybody know different?
Mirror movement yes, shutter, I don't think so. Surely the 'shutter' function is purely electronic sampling of the sensor. There is certainly nothing like the normal film type leading/trailing curtain arrangement inside my camera, not that I can see anyway.
Does anybody know different?
Comment by Mannesty posted on straining the "motor" on the k10d at 12/07/2007 - 14:00
The data may be recoverable but you'll need some specialist data recovery software. Even then, the images may not be useable.
If the card has genuinely failed and is unreadable, the data is lost. If the images have been accidentally erased or the card has been formatted, the data may be recoverable, but not if you continue to use it.
Have a look at R-Studio for some excellent data recovery software.
Regards,
If the card has genuinely failed and is unreadable, the data is lost. If the images have been accidentally erased or the card has been formatted, the data may be recoverable, but not if you continue to use it.
Have a look at R-Studio for some excellent data recovery software.
Regards,
Comment by Mannesty posted on Data corruption at 12/07/2007 - 15:43
Welcome to the forum.
1: Format the card in the camera and try again.
2: Use a different card and try again.
3: If the problem accurs with more than one reasonable quality card (not a counerfeit clone), return the camera to the supplier or Pentax for warranty claim or repair.
Most good quality cards carry a lifetime warranty. If yours is one of these, return it to where you bought it for a replacement.
If you don't have another card, buy 2 or 3 good quality cards. Avoid 'cheap' counterfeit clones. They simply are not worth the money.
Regards,
1: Format the card in the camera and try again.
2: Use a different card and try again.
3: If the problem accurs with more than one reasonable quality card (not a counerfeit clone), return the camera to the supplier or Pentax for warranty claim or repair.
Most good quality cards carry a lifetime warranty. If yours is one of these, return it to where you bought it for a replacement.
If you don't have another card, buy 2 or 3 good quality cards. Avoid 'cheap' counterfeit clones. They simply are not worth the money.
Regards,
Comment by Mannesty posted on Data corruption at 12/07/2007 - 12:16
Quote:
Andy
They charge $59 Canadian, it's your credit card company that fixes the exchange rate.Quote:
the options you have in Artizen for tone mapping are really great. And this piece of software isn't that expensive either.
A bit OT - but on Artizen web-site, one can buy it for 59 CAD. Does anyone know how they translate that into GBP - ie via the normal exchange rate, or like the common '1 to 1' we seem to see making it more like £59? the options you have in Artizen for tone mapping are really great. And this piece of software isn't that expensive either.
Andy
Quote:
Hi travellingmanjim,
This is more likely to be the Orientation Sensor that you can feel/hear moving and yes it is also apparent on my K10D.
Graham.
The orientation sensor is no more than a tiny ball bearing. What you can hear is more likely to be the dust removal system, which you can turn off.Hi travellingmanjim,
This is more likely to be the Orientation Sensor that you can feel/hear moving and yes it is also apparent on my K10D.
Graham.
Comment by Mannesty posted on Camera Internals Moving? at 04/09/2007 - 14:38
