Search results for 'sensor cleaning' - page 120
CZ 35/2.4
I preferred it to the 35/2 in terms of image, but of course the 35/2 has the advantages of AF and an extra half a stop of speed. The differences between them at mid-aperture are non-existent IMO, but the Flek was always just so freakishly sharp wide open and had very pleasant bokeh for a wide(ish) l...
Posted by hefty1 on 04/06/2010 - 18:21
300mm M42 F4 lens
It's a bit difficult to tell sharpness with flowers. Sometimes they look sharper than they actually are and even the slightest breeze can take the edge off. Also moving in closer makes it look sharper and it's more suited to macro lenses. Also with large aperture lens tests you need to take the same...
Posted by Algernon on 11/06/2010 - 19:54
Zoom lens recommendations
Your FZ10 has the same lens that my FZ20 had. You're right that it is a great lens and faster than most SLR telezooms, but on the other hand you can get quite nasty red/purple fringing around highlights with it at 12X zoom unless you stop down to at least f6.3, preferably more (I tended to stop at ...
Posted by JonSchick on 14/06/2010 - 12:27
questions 300mm lens
Had a comment that the SDM motor could let you down. Their quietness would be a boon for birding. The DA*16-50 had a lot of problems and some DA*50-135 but I never heard of a problem with one of the DA* prime lenses or with the newer SDM lenses. Yeah one with the DA 17-70 but cleaning the contacts ...
Posted by Anvh on 16/06/2010 - 15:31
questions 300mm lens
Had a comment that the SDM motor could let you down. Their quietness would be a boon for birding. The DA*16-50 had a lot of problems and some DA*50-135 but I never heard of a problem with one of the DA* prime lenses or with the newer SDM lenses. Yeah one with the DA 17-70 but cleaning the contacts ...
Posted by johnwhit on 16/06/2010 - 17:05
Samyang 85mm f1.4
They also do a faster, cheaper 500mm mirror lens: http://www.amazon.co.uk/Opteka-Telephoto-Mirror-Digital-Cameras/dp/B00281OE1K/ref=sr_1_5?ie=UTF8&s=electronics&qid=1276953554&sr=1-5 I'm slightly tempted at that price, f6.3 isn't much slower than my 300mm zoom (f5.6). Presumably mirror lenses hav...
Posted by chris_jl on 19/06/2010 - 16:22
The lens on my Asahi Pentax...?
You can often buy the dioptre adjuster lenses via ebay, although you may have fun finding the precise type you need as obviously they come in different strengths. It's worth checking for any dirt on the mirror or the eyepiece, although this does sound more like a dioptre thing. Whatever you do, ...
Posted by Dangermouse on 20/06/2010 - 13:08
The lens on my Asahi Pentax...?
The mirror and eyepiece can safely be cleaned with a cotton bud and computer monitor cleaning spray Steady on there Matt! Mirrors are best left well alone - they can easily be knocked out of alignment and the front surface relective coating is very fragile. Once it's out, then so is your focusing ac...
Posted by johnriley on 20/06/2010 - 13:29
M42 Mount 28mm Lens
Funnily enough, I have spent this evening dismantling, cleaning, freeing the stuck iris and then assembling a 50mm f2.8 Carl Zeiss Jena Tessar. I have done many of these and a few pentacon 50s, as well. Those East German lenses are a doddle to work on. Never done a 29, but I would imagine that the...
Posted by mowog on 21/06/2010 - 23:58
645 to K adapter.
No problem I knew there was a site so it only took a quick search. There is also available a 645 Pentax to Canon fitting. I am wondering if the Canon fitting can be substituted with a Pentax type. Any thoughts?? The problem is that the lens mount of the Canon is bigger then that of Pentax so cano...
Posted by Anvh on 26/06/2010 - 14:20
My new K-x and 35mm f2
eh? any digital sensor will clip highlights. that's what they do.... if you don't want highlights clipped, either don't expose that high or shoot on film... As for the Kx, there's a handy mode you can set it to flash any high/low lights when you review pictures. I find that -0.5 is necessary if s...
Posted by flossie on 27/06/2010 - 10:01
DA 40 f2.8 and film
It was the one Chris at SRS offered on here so that wouldn't surprise me R. All the shots I took were at f5.6 or f8 a shallow DOF not being needed. With so many digital lenses that can be used on 35mm,it wouldn't be a problem for Pentax users if (when?) they produced a FF sensor.:wink:
Posted by Hardgravity on 26/06/2010 - 06:50
DA 40 f2.8 and film
With so many digital lenses that can be used on 35mm,it wouldn't be a problem for Pentax users if (when?) they produced a FF sensor.:wink: The problem is the naming, since you need to know out of your head if a lens fits or not :? If they just named the ones with a big enough image circle DFA it ...
Posted by Anvh on 26/06/2010 - 14:22
DA 40 f2.8 and film
I'm sure it's something they can easily clarify if / when they bring out a larger format sensor. I guess they would only approve lenses which worked without compromise though, which would rule out the DA40
Posted by Pentaxophile on 26/06/2010 - 15:31
DA 40 f2.8 and film
I'm sure it's something they can easily clarify if / when they bring out a larger format sensor. I guess they would only approve lenses which worked without compromise though, which would rule out the DA40 So if you buy a DA14 and mount it on a digital 135 format camera it simply won't work? I don'...
Posted by Anvh on 26/06/2010 - 20:40
DA 40 f2.8 and film
Sorry for saying FF, but I'm with you on this Stefan. If a lens works on a FF sensor then it works on the MZ_x bodies, and there's still plenty of them around being used. So Pentax are actually loosing sales because people think the lenses wont fit their particular choice of camera.
Posted by Hardgravity on 27/06/2010 - 09:17
DA 40 f2.8 and film
Sorry for saying FF, but I'm with you on this Stefan. If a lens works on a FF sensor then it works on the MZ_x bodies, and there's still plenty of them around being used. So Pentax are actually loosing sales because people think the lenses wont fit their particular choice of camera. I doubt th...
Posted by George Lazarette on 27/06/2010 - 17:12
DA 40 f2.8 and film
Sorry for saying FF, but I'm with you on this Stefan. If a lens works on a FF sensor then it works on the MZ_x bodies, and there's still plenty of them around being used. So Pentax are actually loosing sales because people think the lenses wont fit their particular choice of camera. I doubt th...
Posted by Pwynnej on 28/06/2010 - 09:00
Lens for my new K-X
All genuine Pentax lenses seem to be going mad of late - 28mm f2.8s for £50? I really think Pentax could profitably wind up CaNikSon by making a cheap-but-decent 28mm AF prime. Other brands have a cheap 50mm f1.8, on an APS-C sensor the 28mm focal length gives a field of view close to the perfec...
Posted by Dangermouse on 30/06/2010 - 11:11
Lens for my new K-X
All genuine Pentax lenses seem to be going mad of late - 28mm f2.8s for £50? I really think Pentax could profitably wind up CaNikSon by making a cheap-but-decent 28mm AF prime. Other brands have a cheap 50mm f1.8, on an APS-C sensor the 28mm focal length gives a field of view close to the perfec...
Posted by Algernon on 30/06/2010 - 12:45
