Search results for 'sensor cleaning' - page 154
All around lens choice
One quick question about the focal length of a lens: When we say that a lens has a 50mm focal length, we mean that this FL stands for a 35mm film camera, is that correct? According to the manual of k10d, to find the actual focal length i must be multiply the lens FL by 1.5 because of the smaller se...
Posted by stratosk on 09/08/2013 - 12:19
All around lens choice
A 50mm lens is always a 50mm lens. When you put it in front of an APS-C sensor it sees a smaller area than if you put it in front of a "full frame" sensor or film camera. What changes is the field of view. So, the 50mm lens on an APS-C DSLR such as Pentax will give a similar field of view to usi...
Posted by johnriley on 09/08/2013 - 13:11
All around lens choice
Thank you John! Yes, of course a 50mm lens will be always 50mm lens! I was meant that the field of view changes because of the sensor! Now i totally understand the difference! Thank you very much John! That means that a normal lens for a non full frame dlsr is about 35mm. The "old standard" 50...
Posted by stratosk on 09/08/2013 - 13:42
DA* motor failure rate
At last a couple of sensible posts. Cheers to the Welsh. When there was a genuine and common problem (the K5 stained sensor) Pentax acted promptly and publicly and replaced all affected cameras free of charge. Where there is a less common problem, which doesn't affect the majority of users, th...
Posted by George Lazarette on 08/08/2013 - 20:55
Fungus on Sigma
At £52.99 per hour it wouldn't take long to rack up a healthy bill, anyone have any feel for lens cleaning times? Seems like they will give you an estimate first though.....
Posted by K30git on 22/08/2013 - 10:17
Pentax Lens refresh...
These lenses are FF capable are they not? They changed pretty much just the coatings? so it appears to me that the FF body is not ruled out... if anything, the refresh shows a higher resolution sensor is on it's way.... so the most likely candidates for that sensor will be found in Nikon or Leica...
Posted by Don on 29/08/2013 - 03:24
Pentax Lens refresh...
These lenses are FF capable are they not? They changed pretty much just the coatings? so it appears to me that the FF body is not ruled out... if anything, the refresh shows a higher resolution sensor is on it's way.... so the most likely candidates for that sensor will be found in Nikon or Leica...
Posted by Algernon on 29/08/2013 - 10:52
Pentax Lens refresh...
I for one could care less about FF sensor. I gave up film long ago. I care about image quality, and right now dynamic range is more important to me than sensor size. I also want RAW video codec. I have yet to have a client complain about the quality of the files from my k10 which is still my pri...
Posted by Don on 29/08/2013 - 14:53
Pentax Lens refresh...
I for one could care less about FF sensor. Yeah me too Don! I mean I care about it quite a lot, but not that much. I could, therefore, care less.
Posted by Pentaxophile on 29/08/2013 - 15:37
Pentax Lens refresh...
I for one could care less about FF sensor. Yeah me too Don! I mean I care about it quite a lot, but not that much. I could, therefore, care less. :twisted::twisted::twisted: hehehe! ya got me! :lol:
Posted by Don on 29/08/2013 - 20:31
Are manual lenses really any use ?
Some film lenses are superb, others abysmal and every step in between those extremes. Digital lenses are designed to be telecentric, that is the light rays exiting are as parallel as possible. Film lenses did not need to direct light in the same way so especially wide angles have light rays strik...
Posted by johnriley on 03/09/2013 - 19:01
Are manual lenses really any use ?
check out this site Stuart - it has useful reviews of manual lenses which I have based lots of my ebay purchases on - I have not been disappointed to date using these on my K5IIs Was my first port of call Stephen. - 2x Teleconverter - Teamed up with Sigma 105 Macro for higher macro magnification An...
Posted by stub on 04/09/2013 - 10:05
Are manual lenses really any use ?
2x Teleconverter - Teamed up with Sigma 105 Macro for higher macro magnification Another good and interesting comment. Looking forward to giving that a try on my Sigma 105. Going into other territory here. Do you not find a 50mm lens a little short for portraiture work ? Even on a cropped senso...
Posted by davidstorm on 04/09/2013 - 21:44
Any big differences between the DA 50mm and 35mm lenses?
Hi all, Have just sold my Pentax-A 50mm manual lens and am considering replacing it with a newer autofocus equivalent. I have the 2.4mm and have found it quite good. A funny field of view in a lot of ways, but good for a portrait that shows the surroundings, if that makes any sense. The 50...
Posted by richandfleur on 03/09/2013 - 11:39
Sigma 17-50mm f/2.8 EX DC OS HSM
Wow £309, that's a good price for such a premium piece of kit. And without the worry of wondering when the SDM will fail. Thats what I thought, it was over £500 not so long ago, still is at some places Is the Pentax version OS or not? I always get confused by these things The DA* 16-50 does not ...
Posted by Russ on 25/09/2013 - 18:12
HD Pentax-DA 55-300mm f/4-5.8 ED WR
Got to agree with the dust comment mine is quite bad, but as mentioned not an issue with image quality so far, but when using it I do have to use the sensor cleaning option quite vigorously. But on to the WR version, will definitely be on the shopping list after the body upgrade, especially if it...
Posted by InFESTation on 06/10/2013 - 20:02
Landscape Photography - A new dawn....
and that just having a newer model camera would not make a significant difference, or at least would probably not be worth the money for me at least. That doesn't mean a newer camera would not be worth it for some shots though. Sorry, I utterly disagree, I went from the 7 to the 5iis and they are le...
Posted by Smeggypants on 21/10/2013 - 22:16
DA* 50-135 SDM autofocus problems.
If you drive an older vehicle, worth only...say £1000, but it needs £180 spent on it to last another few years, it seems sensible, and good value. Strange then that people owning a £1000 lens baulk at paying £180 or so for the new updated SDM motor and sensor? They should return the lens to 'a...
Posted by grahamcoad on 30/04/2014 - 19:37
Boot sale bargain
On Saturday I succumbed to LBA again, after spotting a Tamron SP 90mm f/2.5 at the local boot sale. At first I managed to resist, but after walking off I remembered there was a macro Tamron that matched those details that actually had a rather good reputation, so went back for a second look. The bo...
Posted by petrochemist on 04/11/2013 - 22:02
The 50mm 1.7 - Discuss
Thanks guys. Im going to plump for the M version. Do you know anything about the 85 F2 guys? My first port of call when investigating a lens is to the Pentax Lens Reviews and in the case of the 85MM f2.0 that means here:- I happen to own one of these and whilst the body of it is pristine, re...
Posted by Defragged on 12/11/2013 - 22:03
