Search results for 'sensor cleaning' - page 110
Even the 31mm Ltd may not be up to the optical challenge?
I should have made myself clear that I meant that if we take the central portion of the image that a FF sensor would not make the FA31 look any worse. I agree with that. Of course, there is another point (in favour of the larger sensor). That is that pictures shot on a larger sensor need less ma...
Posted by George Lazarette on 20/10/2009 - 09:54
Pentax 50-135 SDM
On a GX10 you'll notice no difference between the MK1 18-55 and the MK2 versions. Samsung, Pentax, same lens, but the MK2 was designed for the higher resolution capabilities of the K20D/GX20. Peter you think very highly about the DA18-55 lenses I wonder why you have the DA16-45 or DA*16-50 since the...
Posted by Anvh on 20/10/2009 - 23:06
Pentax 50-135 SDM
I don't agree with this at all. Even on my *ist D I could tell the difference between the 31mm and other quite sharp lenses. It is a myth that having a sharper lens makes no difference on a smallish sensor. G
Posted by George Lazarette on 20/10/2009 - 23:09
Pentax 50-135 SDM
Peter you think very highly about the DA18-55 lenses I wonder why you have the DA16-45 or DA*16-50 since the DA18-55 is already using all the resolving power of the sensor so those lenses can't be sharper on a K10D :wink: The DA 18-55mm kit lenses, MK1 & 2 are very capable lenses. I still own a MK...
Posted by Mannesty on 21/10/2009 - 09:56
The Effects of Fungus
I dug out my old Kenlock 30 year old+ 70-215 3.5 Macro lens only to find it has fungus on the inside, might have a go at cleaning it as it is a really good lens, so here is the effects of a lens with Fungus, I quite like it though. :roll:
Posted by jackitec on 22/10/2009 - 16:56
Sigma 28-200mm
I have a similar lens (Sigma Aspherical IF 28-200mm) and have done quite a few shots with it on film and digital SLR bodies. My lens has the magic ability to not focus correctly on my K10D body particularly over 80mm focal length. I am running firmware/software version 1.30 on my K10D and all my p...
Posted by SteveBath on 24/10/2009 - 17:53
Sigma 28-200mm
You could try asking , he did a great job of cleaning a 200mm prime for me a while ago and charges very fair prices.
Posted by Dangermouse on 11/06/2010 - 17:19
Keep the FA f1.4 or the f1.7 ?
Could u expound on this a bit John, for those of us who don't have a clue what you're talking about A lens projects an image onto the sensor/film and, uncorrected, this would be dish shaped, just as the lens elements are curved, so projecting onto a flat sirface the centre might be in focus and the ...
Posted by johnriley on 25/10/2009 - 11:33
Keep the FA f1.4 or the f1.7 ?
Could u expound on this a bit John, for those of us who don't have a clue what you're talking about A lens projects an image onto the sensor/film and, uncorrected, this would be dish shaped, just as the lens elements are curved, so projecting onto a flat sirface the centre might be in focus and the ...
Posted by stu49 on 25/10/2009 - 11:55
Lens sharpness.
The easiest lens to make in a range is one slightly longer than a standard, so in 35mm film terms a 58mm is often found for faster lenses in the early days of SLRs. But all lenses in a range should be sharp. Well yes all lenses should be sharp but relative to their focal length. Since the furthe...
Posted by Anvh on 26/10/2009 - 22:27
SIGMA 50-500 EX DG
True Mike, however the Canon 100-400 got walloped by the 120-400 and 150-500 in the PP test. I have a could of friends with the 100-400, and although good, they say it is not the best. They always complain about the lack of decent long tele-zooms in Canons range. In fact one guy hired the 120-300 F2...
Posted by Offertonhatter on 04/11/2009 - 21:35
long zooms 35mm film type or digital
No. Focal length is focal length and a 300mm lens on film is still a 300mm lens on digital. The difference is that your digital sensor "sees" a cropped part of the image projected by the lens (because it's smaller than a 35mm film area). Hence a 300mm lens fitted to a digital camera will "see"...
Posted by hefty1 on 01/11/2009 - 22:31
Help! SMC Pentax-A 50mm should work on K-m / K-2000?
if the lens is on 'a' setting and your setting the aperture on the body or in one of the automattic modes it should work. the aperture ring, off the 'a' modes should turn easily and click into the f stops nicely. if it feels weird turning, send it back. if turns properly, try cleaning the contacts....
Posted by Don on 05/11/2009 - 17:08
Lens purchasing dylema, help before I drive my wife mad!
How can you manage without a wide angle lens? Get a 12-24 from Amin if he has any left. You haven't lived (photographically) until you've gone wider than 28mm FF which is about 18 on APS sensor. No brainer in my view. Mike
Posted by mikew on 05/11/2009 - 19:46
Lens purchasing dylema, help before I drive my wife mad!
How can you manage without a wide angle lens? Get a 12-24 from Amin if he has any left. You haven't lived (photographically) until you've gone wider than 28mm FF which is about 18 on APS sensor. No brainer in my view. Mike I had not considered anything quite so wide, do the images tend to be d...
Posted by Technoblurb on 05/11/2009 - 20:29
An assortment Pentax manual lenses
Thanks for the info. How do these lenses fare on a digital sensor. I've read that "film" lenses wider than 50mm can cause bad aberations due them not being telecentric.
Posted by mattcambs on 06/11/2009 - 13:03
Pancake lens or quality compact ??
The LX3 is very good considering it's a compact, especially in good light. And even in low light it does well bearing in mind the size of the sensor. I'd imagine it is pretty good as a carry everywhere landscape camera (used mine for mostly street stuff). But don't expect SLR results. It's good, but...
Posted by Dr. Mhuni on 08/11/2009 - 17:53
Pancake lens or quality compact ??
Do you thing so John. The write ups seem pretty good and seem to indicate that it would be an improvements over an entry level dSLR. Only time will tell I guess. Regards Richard Yes and it's very easy to explain. The smaller the pixel the less surface area it has to "capture" light meaning that...
Posted by Anvh on 21/11/2009 - 15:13
Pancake lens or quality compact ??
All else being equal, yes. In fact, sensor technology continues to improve, and the quality we now get from a 14MP APS-C sensor was the stuff of dreams just a few years ago. As the technology evolves, we reach a stage where a sensor can output more detail at high quality than we can possibly n...
Posted by George Lazarette on 21/11/2009 - 16:10
New standard zoom - what would you buy?
Hi, Lucida... Pentax 17-70 f/4 looks like an option apart from the aperture. Need more light and the trade off between 70mm and extra drop focus created by the tele or 50 and the extra drop focus created by the F2.8. Ice... I considered the K20 as a nice cheap option. But again, though it has a...
Posted by Bluewhistle2 on 18/11/2009 - 01:41
