All Forum Comments
Comment by JAK posted on FS: Pentax FA* 300mm f2.8 ED(IF) at 21/02/2012 - 11:09
steven9761 wrote:
I don't know if DSLR's have internal batteries similar to the battery that sits on your computer's mobo.
Some makes certainly do but not Pentax.I don't know if DSLR's have internal batteries similar to the battery that sits on your computer's mobo.
How long an interval between turning off and back on again? The camera manual suggests that the time and date may get reset when you insert fresh batteries after a long while but that shouldn't happen after a short interval in the same shooting session though.
John
Comment by JAK posted on K100D wont save date at 09/02/2012 - 23:16
Just a quick thought, have you got the noise reduction setting turned on (in C Custom Settings menu?)
John
John
Comment by JAK posted on Photoshop help, please! at 09/02/2012 - 23:00
I prefer the DA12-24 to the older Sigma 10-20 (not tried the new one.) I agree the Pentax lens is a little sharper, has a more even exposure across the frame and has great bokeh.
Don't forget though the Sigma 8-16mm which is extremely good and does have HSM. It's not a fish-eye either.
John
Don't forget though the Sigma 8-16mm which is extremely good and does have HSM. It's not a fish-eye either.
John
Comment by JAK posted on Advice on wideangle? at 09/02/2012 - 13:52
Well it seems some users do use the power zoom with their DSLRs, so yes, it should work fine.
It could still be clue though. It is more to go wrong and if it has failed somehow it could be preventing the camera from operating normally. Especially if the camera works fine with other lenses.
As suggested, make sure the contacts are clean.
John
It could still be clue though. It is more to go wrong and if it has failed somehow it could be preventing the camera from operating normally. Especially if the camera works fine with other lenses.
As suggested, make sure the contacts are clean.
John
Comment by JAK posted on Pentax FA F4-5.6 70-200mm at 07/02/2012 - 12:06
Normally an FA lens should work the same as any other current lens providing the aperture ring is set on the A setting. However, I believe this particular lens is unique to the FA series in that it features a power zoom which uses the same contacts now used for SDM focussing.
link
That being the case it looks like it is an oddity and will not work unless the SDM contacts are disabled somehow. It's probably safest to look at getting an alternative lens such as the DA or DA-L 50-200mm or possibly even better, the 55-300mm.
John
link
That being the case it looks like it is an oddity and will not work unless the SDM contacts are disabled somehow. It's probably safest to look at getting an alternative lens such as the DA or DA-L 50-200mm or possibly even better, the 55-300mm.
John
Comment by JAK posted on Pentax FA F4-5.6 70-200mm at 07/02/2012 - 11:42
Quote:
The downside to adopting the K Mount is that it defines the distance between the back of the lens and the sensor, known as the flange back distance. This is 45mm for K Mount cameras, which is significantly deeper than in rival CSC systems such as Micro Four Thirds (20mm) and Sony NEX (18mm). As such, the K-01 is a lot chunkier and a little heavier than rival CSCs, at 59mm deep and 560g without a lens. Then again, the Sony NEX range's short flange back distance is arguably the main reason why these cameras sometimes struggle to achieve sharp focus across the entire frame. Most other CSCs use a short flange back distance too, but pair it with a smaller sensor, which avoids focus problems but limits their low-light performance.
It seems likely that the K-01's relatively chunky body is a necessary compromise for achieving both low noise and sharp edge-to-edge details – something of a Holy Grail for CSCs at the moment.
from expertreviews.co.uk linkThe downside to adopting the K Mount is that it defines the distance between the back of the lens and the sensor, known as the flange back distance. This is 45mm for K Mount cameras, which is significantly deeper than in rival CSC systems such as Micro Four Thirds (20mm) and Sony NEX (18mm). As such, the K-01 is a lot chunkier and a little heavier than rival CSCs, at 59mm deep and 560g without a lens. Then again, the Sony NEX range's short flange back distance is arguably the main reason why these cameras sometimes struggle to achieve sharp focus across the entire frame. Most other CSCs use a short flange back distance too, but pair it with a smaller sensor, which avoids focus problems but limits their low-light performance.
It seems likely that the K-01's relatively chunky body is a necessary compromise for achieving both low noise and sharp edge-to-edge details – something of a Holy Grail for CSCs at the moment.
That's a very positive comment.
John
Comment by JAK posted on Pentax K-01 at 06/02/2012 - 12:14
rosesred wrote:
http://www.jessops.com/online.store/products/84039/show.html
jessops £679.95
http://www.jessops.com/online.store/products/84040/show.html
jessops £629.95
Who's first in the Q ? (Sorry wrong camera.)http://www.jessops.com/online.store/products/84039/show.html
jessops £679.95
http://www.jessops.com/online.store/products/84040/show.html
jessops £629.95
It's not much less than they sell the K-5 for.
... Where's the new 40mm?
Customers also viewed ... a heap of Canon DSLR's. I bet (they didn't!)
John
Comment by JAK posted on Pentax K-01 at 04/02/2012 - 01:23
I've just taken my K-5 outside to take some photos of crocuses in the afternoon sunlight with my 50mm FA macro lens. I tried using liveview to simulate taking such a photo on a K-01 but I couldn't see what I was taking as the screen was reflecting the sunlight. Getting a shot in focus wasn't possible, the autofocus doesn't know what the target is. I'd have had to resort to draping a cloth over my head and camera like the plate camera togs did of old just to get started!
I've got several compacts with no viewfinder and find them unusable and will get shot of them in due course. For some photography a viewfinder is a must have (macro, long lenses, use in sunlight) so I wouldn't think of buying a K-01.
John
I've got several compacts with no viewfinder and find them unusable and will get shot of them in due course. For some photography a viewfinder is a must have (macro, long lenses, use in sunlight) so I wouldn't think of buying a K-01.
John
Comment by JAK posted on Pentax K-01 at 03/02/2012 - 13:43
TOZZA27 wrote:
I must admit I bought a 1.4 Tak M42 from ebay a year or so ago for under £25 with "some fungus" and was going to clean it,but then read - on here I think - that sunlight was the best way to alleviate the problem - so it is kept always in direct sunlight when not in use - and when there is any - and I must admit it has never affected ANY of my photgraphs taken with it on the *istD with adapter.
Obviously just my opinion
Tony
I think the danger could be that if the fungus is still alive, spores could enter the camera and damage that and also infect lenses installed afterwards. However if you've killed the infection with the UV light then hopefully all will be well. Still best to be careful though.I must admit I bought a 1.4 Tak M42 from ebay a year or so ago for under £25 with "some fungus" and was going to clean it,but then read - on here I think - that sunlight was the best way to alleviate the problem - so it is kept always in direct sunlight when not in use - and when there is any - and I must admit it has never affected ANY of my photgraphs taken with it on the *istD with adapter.
Obviously just my opinion
Tony
John
Comment by JAK posted on Lens cleaning (internal) at 02/02/2012 - 21:06
I notice, having looked at help topics, that it is necessary to use Photobucket or similar in order to upload images to the forum. I do not have such a facility, nor wish to join a web hosting site for this purpose
Hope that helps,
John