Search results for 'sensor cleaning' - page 152
Pentax K-30 and Legacy Glass
Hi, I have the 50mm F1.7 Manual. Fun little thing, I don't regard it as better than modern lenses although it is nicely made. I use mine with extension tubes for macro or as a nice portrait lens on the cropped sensor of my K5. Pentax kit lenses are excellent (unlike some makes)and have very simil...
Posted by wvbarnes on 26/02/2013 - 23:35
Pentax K-30 and Legacy Glass
Tobie, Funnily enough I've just done this. I bought a job lot which included a Pentax A 50mm F2 and had a play at the weekend. Here's an image with the K-30 and 50mm I took Sunday after spending Saturday cleaning it up. https://www.pentaxuser.com/photo/loch-lomond-looking-north-59169/large
Posted by jamieallan on 27/02/2013 - 10:57
Pentax K-30 and Legacy Glass
Nice photo ... :D:D Tobie, Funnily enough I've just done this. I bought a job lot which included a Pentax A 50mm F2 and had a play at the weekend. Here's an image with the K-30 and 50mm I took Sunday after spending Saturday cleaning it up. https://www.pentaxuser.com/photo/loch-lomond-looking-nort...
Posted by col55555ine on 27/02/2013 - 12:54
Pentax K-30 and Legacy Glass
Tobie, Funnily enough I've just done this. I bought a job lot which included a Pentax A 50mm F2 and had a play at the weekend. Here's an image with the K-30 and 50mm I took Sunday after spending Saturday cleaning it up. https://www.pentaxuser.com/photo/loch-lomond-looking-north-59169/large Looks n...
Posted by tobinobin on 27/02/2013 - 19:13
Strip and rebuild
Before I start trawling the internet does anyone know where I can find a guide to stripping, cleaning and rebuilding manual Pentax lenses please?
Posted by AndrewA on 08/03/2013 - 18:17
Strip and rebuild
Before I start trawling the internet does anyone know where I can find a guide to stripping, cleaning and rebuilding manual Pentax lenses please? Are you having a go a the M-28mm F3.5? Best of luck with it, I got it stripped down so far but could not get into the inner assembly where the aperture p...
Posted by davidstorm on 08/03/2013 - 20:45
Strip and rebuild
Before I start trawling the internet does anyone know where I can find a guide to stripping, cleaning and rebuilding manual Pentax lenses please? Are you having a go a the M-28mm F3.5? Best of luck with it, I got it stripped down so far but could not get into the inner assembly where the aperture p...
Posted by AndrewA on 09/03/2013 - 00:00
Pentax FA 20-35 f4 - Any users of this lens?
That's a strange verdict in the sense that the 20-35mm was a film camera lens and the 16-45mm was much later and quite disconnected in any timeline. It was with relevance to how useful the lens would be on a crop sensor DSLR, in this case the Pentax K10D where it would have a field-of-view equivalen...
Posted by johnwhit on 14/04/2013 - 10:32
Newby with a question about lenses for wildlife
There are a couple of lenses in the classifieds which may still be available: Tokina MF 60-300: Tamron AF 70-300: Don't forget that your 50-200 already behaves like a 75-300 because of the sensor size (multiply the length by 1.5x). Buying better lenses usually pays off in the long ru...
Posted by johnha on 08/05/2013 - 22:31
Newby with a question about lenses for wildlife
Don't forget that your 50-200 already behaves like a 75-300 because of the sensor size (multiply the length by 1.5x). True, when you compare it to the field of view on a full frame, but equally you can say that the 70-300 compares to a 105-450 on full frame. _
Posted by percy on 09/05/2013 - 08:13
Starting from Scratch with Lenses
I can't really see where the sigma 150-500 has come into the equation My photography is just going to be a hobby from now on. The indoor sports and portraits were work which I'll probably not be doing anymore. I have always wanted to try my hand with tracksports but never had the chance to have ...
Posted by ferret1981 on 23/05/2013 - 21:59
SMC A50mm f1.2 vs FA 43mm f1.9 limited
There's something satisying about getting that subject 'pop' against the background straight out of camera, and it's quite an involved process to get it to look perfect in photoshop - with some subjects at least. I am open to the notion that the fast lens / big sensor 'shallow dof on wide angle' ...
Posted by Pentaxophile on 29/05/2013 - 09:55
Current state of affairs - Warning lens P0rn!
I complain about the Vivitar 135/2.8 Close Focusing being too big and heavy for my typical usage. It's 425g and 86mm long. No doubt the DA*50-135 is an excellent lens. But it's 765g and 136mm. For that much effort I'd like to cover a 645 sensor at least! (Never mind "full-frame"!) The Vivitar ...
Posted by rparmar on 21/05/2013 - 13:11
DA 35mm f2.8 Macro LTD v Sigma 50mm f/1.4 EX DG HSM
Hi Andrew I had the Sigma and now have the Pentax. In terms of IQ IMHO - they are both excellent - although if pushed I would say I prefer the colour rendition from the Pentax - but maybe that is down to the use the Pentax has had Vs the Sigma. The reason I sold it is that I find 50mm is rarely ...
Posted by fritzthedog on 21/05/2013 - 22:20
Sigma 100-300mm F4 - focusing beyond infinity
I had a Canon mount Sigma 70-200mm f2.8 that I bought for peanuts as the AF was not working, sent it to Sigma who fixed it (that cost about £130) and I'm not kidding, when it came back it was so sharp it was unbelievable. Would be interested to see what your 100-300mm is like on it's return, mine se...
Posted by jeallen01 on 12/06/2013 - 17:45
FA 31mm - anyone bought from Kerso?
Thanks guys Thinking a little into the future and the possible arrival of a Pentax FF I have read that lenses designed for film might not perform quite so well on digital, unfortunately as pentax have never had FF digital there's no user data to go on so is it possible this might turn out to be ...
Posted by gartmore on 31/05/2013 - 07:16
FA 31mm - anyone bought from Kerso?
Thanks guys Thinking a little into the future and the possible arrival of a Pentax FF I have read that lenses designed for film might not perform quite so well on digital, unfortunately as pentax have never had FF digital there's no user data to go on so is it possible this might turn out to be ...
Posted by simonkit on 31/05/2013 - 08:47
FA 31mm - anyone bought from Kerso?
Digitally-designed lenses have a telecentric design. This means that light rays are parallel when they exit the rear element. The light thus falls squarely into the pits on the sensor surface that hold the individual pixels. Some film designed lenses will work very well, especially from short tel...
Posted by johnriley on 31/05/2013 - 09:31
My lens is better than yours :-)
I can't see any point in this test because it's done on an small Olympus MFT camera and not on a Pentax APS-C. Bokeh especially will be different. It's true, yes, I agree. There is no point to any photography not done with a Pentax camera. :lol: All the K-mount lenses we compared were designed ...
Posted by rparmar on 05/06/2013 - 20:10
My lens is better than yours :-)
I meant in the middle where the subject is. At least my subjects are not always in the middle of the picture ;) . You know though that "middle" in this context actually covers most of the area of the frame. Unless you are putting your subject at the very edges, which would be an unusual composition!...
Posted by rparmar on 10/06/2013 - 16:17
