Search results for 'sensor cleaning' - page 165
Full Frame Lenses
So stuck with a wholly inadequate K5 with its antiquated sensor and awful image quality. Maybe it's time to take up fishing instead :wink:
Posted by Mike-P on 25/09/2015 - 08:32
Full Frame Lenses
So stuck with a wholly inadequate K5 with its antiquated sensor and awful image quality. Maybe it's time to take up fishing instead :wink: I went fishing once, Mike. Once.
Posted by bwlchmawr on 25/09/2015 - 20:16
Full Frame Lenses
Hey Algi, any idea how my little F35-70macro will fare. ... ? It's looking like it might be my only hope, at least as far as a FF standard zoom goes ! The Samgyang 14mm will have all the resolution, contrast and aberration control needed, but its edge distortions on FF may well have me cropping ...
Posted by McGregNi on 27/09/2015 - 17:57
Full Frame Lenses
To be full frame the image the lens projects onto the sensor needs to be wide enough to cover the 24 x 36mm frame. APS-C lenses are smaller and project smaller image circles, so don't cover the whole of a full frame. In this context, full frame means a format size the same as 35mm film cameras.
Posted by johnriley on 30/09/2015 - 23:40
Full Frame Lenses
I know that a lot of the old glass is tempting, and there's a nostalgia to the look and feel of it .... But really, this new FF is about more than just a bigger sensor with a 'wider image circle' . It's going to represent the latest and greatest Pentax have offered, a quality package of the highest ...
Posted by McGregNi on 01/10/2015 - 10:31
Lenses, lenses- what makes a lens special (I don't get it)
I doubt that there is much difference in colour rendering, how could there be ....? Lens coatings should not transfer any colour cast through into the image. Colours are a product of the sensor and image processing functions within a camera. We've heard it claimed here that some macro lenses are '...
Posted by McGregNi on 06/10/2015 - 11:04
Lenses, lenses- what makes a lens special (I don't get it)
Above a certain level, probably all lenses are good. Competent and consistent performers as to sharpness, contrast-- the works! Generally, single focal length "Prime" lenses have to make fewer compromises than zoom lenses, and the fixed focal length allows a user to learn its strengths and any we...
Posted by grahamcoad on 06/10/2015 - 11:39
Which weathersealed lens for my K50?
To be fair I don't actually mind the 18-55, even in non-WR it's a decent enough lens. Just seems slightly daft not to get a faster/constant aperture. I do, do photography in poor light and while the K50 has decent ISO range, still better to keep the ISO as close to 100 as possible. I like to keep th...
Posted by bwlchmawr on 08/10/2015 - 08:11
Cheap 70-300mm lenses.
I know you've discounted it already, but I can't rate the 55-300 from Pentax highly enough. It's a great balance of image quality, size/weight and price. It would be best option, IMO, if you were able to save up for it. Teleconverters are a mixed blessing. It really depends on the scenario you ne...
Posted by pezking on 19/10/2015 - 19:01
Pentax DA 560 or SIGMA 500 APO - which one
The sensor kind of generates its own shake because it can't find any that its expecting to find for it to counter. IMHO, if nothing on the bird shot is in focus, it sort of suggests camera shake of some sort or perhaps a lens requiring a service. If you were closer I'd suggest we meet and you tr...
Posted by Chrism8 on 06/12/2015 - 17:16
Guide to the naming of Pentax lenses
As others have said all full size Pentax bayonet mount lenses can be used with any Pentax DSLR. (Pentax has also made miniature 110 & Q series lenses which can't). Third party K mount lenses are also fine. There are limitations with older lenses - the camera can only control aperture on PKA & la...
Posted by petrochemist on 03/01/2016 - 14:01
Guide to the naming of Pentax lenses
When the new Full frame camera comes out some of the current DA lenses will not give full sensor coverage - all the older film lenses should be OK. .......but if the rumours are true the FF camera will be able to crop the image so DA lenses can be used:wink:
Posted by fatspider on 05/01/2016 - 00:55
Guide to the naming of Pentax lenses
Not just a rumour When the new Full frame camera comes out some of the current DA lenses will not give full sensor coverage - all the older film lenses should be OK. .......but if the rumours are true the FF camera will be able to crop the image so DA lenses can be used:wink:
Posted by wvbarnes on 05/01/2016 - 16:39
What's your favourite lens and why?
currently probably FA20-35 - for being optically superb for a zoom, very compact and lightweight and very useful although limited range - great street & landscape lens overall probably FA 43 limited grabs the title of most favourite - great on film as well as on sensor :)
Posted by kingfisher on 13/02/2016 - 08:57
Upgrade from Sigma 17-70 or just have it serviced?
Well I still haven't made my mind up, though the Sigma, K5ii and myself all took an accidental dunk in a stream over the weekend, much to the wife's amusement. Everything still works but it's fair to say the front of the Sigma requires a cleaning more than ever ....
Posted by woodworm on 02/02/2016 - 12:37
Sigma Art 18-35 F1.8
18 mm at f1.8 for astrophotography. As far as I know and I don't have this lens but I'm getting one, the patchy af stems from pdaf, not the cdaf. Apparently in live view its spot on, and mostly spot on through viewfinder. The pentax 20-40mm was in the mix for me also, heard great reports about i...
Posted by derek897 on 23/01/2016 - 01:56
Sigma Art 18-35 F1.8
18 mm at f1.8 for astrophotography. As far as I know and I don't have this lens but I'm getting one, the patchy af stems from pdaf, not the cdaf. Apparently in live view its spot on, and mostly spot on through viewfinder. The pentax 20-40mm was in the mix for me also, heard great reports about i...
Posted by BruceStrachan on 23/01/2016 - 09:01
Sigma Art 18-35 F1.8
Conqueror, I could get the stars to stay still with an astrotracer, the moving sensor would make a mess of the arc though, and foreground would be blurred. And I'd still lose the structure. Only taken the lens out twice. First time there was an aurora on the day I got it. That's when I found out th...
Posted by Blythman on 23/01/2016 - 20:14
Sigma Art 18-35 F1.8
Conqueror, I could get the stars to stay still with an astrotracer, the moving sensor would make a mess of the arc though, and foreground would be blurred. And I'd still lose the structure. Only taken the lens out twice. First time there was an aurora on the day I got it. That's when I found out th...
Posted by Conqueror on 24/01/2016 - 08:37
Sigma Art 18-35 F1.8
Conqueror, I could get the stars to stay still with an astrotracer, the moving sensor would make a mess of the arc though, and foreground would be blurred. And I'd still lose the structure. Only taken the lens out twice. First time there was an aurora on the day I got it. That's when I found out th...
Posted by Blythman on 24/01/2016 - 10:33
