Search results for 'sensor cleaning' - page 83
Tokina SD 28-70mm f3.5
I also have a Zeiss 35 Flek, it makes a fantastic standard lens on crop sensor digital when I'm not too lazy to work around the metering.
Posted by Mongoose on 16/10/2009 - 12:39
Sigma DC 18-50mm on Film SLR?
In a word No! The Sigma lens is designed to be used with the APS sized sensor of a digital SLR. It then represents the 35mm equivalent of about a 28-75 standard zoom. Pictures taken on 35mm film with this lens will be vignetted. If you have an *ist, Z-1/P or other camera that can set the ape...
Posted by sperger2003 on 02/04/2004 - 22:18
MZ 50 and compatible lenses ?
Any lens with a Pentax KA bayonet mount will work on your camera. The "A" is important. It refers to a setting on the aperture ring which allows the camera (rather than the photographer) to set the aperture. You can see what I mean in this picture: http://www.bdimitrov.de/kmp/lenses/primes/w...
Posted by George Lazarette on 10/04/2004 - 11:21
lens compatibility for the *ist D
You can use any Pentax compatible lenses with the *ist-D. (You didn't specify which lenses you had - only the camera.) It works best with lenses that have automatic aperture, though it will support fully manual lenses. I've not tried it, except for using the extension tubes which put it in that ...
Posted by MattMatic on 20/05/2004 - 13:08
Fungus/mould in lens - worth repairing?
Hi all I bought my girlfriend a P30t with an old Pentax A 28-80 f3.5-4.5 lens, unfortunately there is a lot of mould on the glass and was hence 'sold as seen', and I was really just after the camera body. Does anyone know how difficult it would be for an amateur like me to have a go at cleanin...
Posted by mattie on 14/06/2004 - 18:00
Pentax-F 1:3.5-4.5 35070mm. Comments please.
I have recently had these three variants of this lens side by side to test, all bought on eBay for about £20 each. So they are used not new samples, though none seemed to have suffered obvious abuse. I used them on my new *st DS so I can't comment about edge or corner performance on full-frame 35mm ...
Posted by Anonymous on 03/06/2005 - 16:01
Pentax 17-45
I know the 16-45 is intended to cover the sensor size of the *istD, but has anyone tried it on a 35mm body to see what sort of vignetting effect you get? It could be interesting and I'd be very interested to hear how it works and how it is affected by changing the aperture.
Posted by johnriley on 21/06/2004 - 23:12
fungus and lens ring adaptor
Hello to Everyone! I've just received an old Pentax lens from a friend. It's an Asahi Pentax 1000mm. It is a Monster Giant Lens! Weighs quite a lot. It's about 70 cm. long and it's screw type. Diameter is 14.5cm. On the front of the lens, it says Super Multi Coated Takumar 1:8/1000 Asahi Opt. Co...
Posted by funky_monkey on 22/06/2004 - 18:10
50mm+ Zoom for *ist D
Regarding a telephoto zoom to compliment my 16-45mm, I think I already have the lens which was at the bottom of my cupboard! For a long time I have owned an old Sigma 75-300 f/4.5 - f/5.6 DL AF "trombone" lens for use with my Pentax MZ-5n (now, sadly, unused). As I was not always happy with it...
Posted by Malcolm Riches on 09/07/2004 - 11:51
K mount lens speed on *ist ds
No, it means the apparent focal length increases, because the sensor is smaller than a piece of 35mm film. So, if the multiplier were 1.5x then a 50mm lens would appear to act as a 75mm one would on a 35mm camera. A 100mm lens would be equivalent to a 150mm, and so on. This means that wide angle...
Posted by johnriley on 16/10/2004 - 13:55
Wide angle for digital
HI I on the other hand love extreme wide angles zoom lenses and i am quite disappointed with the availability of them for Digital Most zoom lenses have become 'normal' wide angle and only some (if not only one the 14 mm which becomes 21 in reality) is available which is a fix focal length Not...
Posted by Pano on 20/10/2004 - 10:23
Wide angle for digital
I have the Pentax SMC-DA 16-45mm for the *ist-D. A wonderful lens, excellent sharpness, and very, very good flare control. Now, it may not compare directly to a prime lens, but I find there is little difference between it and the SMC-F 50mm/1.7 and the SMC-F 28mm/2.8. The view is bright and clear...
Posted by MattMatic on 20/10/2004 - 10:43
SMC Pentax DA18-55
McBrian, A focal length is a focal length, and it doesn't change. What does change, depending on the size of the sensor or film frame, is the angle of view. In this case, 18-55mm translates to an angle of view on a D or DS that is similar to 28-80mm on a 35mm camera.
Posted by George Lazarette on 19/12/2004 - 20:25
SMC Pentax DA18-55
John/George, Thanks for the replies. Brain not working too great at the moment, just getting confused when the lens is described for digital, of course when you get the brain in gear you suddenly realise that not all digitals may have the same size of sensor.
Posted by Anonymous on 20/12/2004 - 18:50
SMC Pentax DA18-55
Exactly, which is why the "35mm equivalent" is quoted a lot, so we have some frame of reference. The pentax DA digital lenses are also different in that they only have an image circle that covers the size of the sensor - used on a 35mm body the corners would vignette. This might, of course, be a ...
Posted by johnriley on 20/12/2004 - 19:00
SMC Pentax DA18-55
The pentax DA digital lenses are also different in that they only have an image circle that covers the size of the sensor - used on a 35mm body the corners would vignette. Not only vignette but the extreme corners are black. If you want 35mm-film-slr without this effect you'll have to move up to th...
Posted by Anonymous on 11/02/2005 - 08:52
Lens purchasing help!
Thats good news, because me being an absolute retard, I managed to destroy the focusing screen of my MX today. I was cleaning out the inside, and finding that the foam is really gunky, and on the focussing screen. So I was cleaning the screen with methelated spirits.... at which point the focusing s...
Posted by Anonymous on 13/04/2005 - 22:25
Oh boy! Pentax M 50mm F/1.4 !
Well... I just bought a second hand 80-320 zoom, wich I expect to receive in a few days. Having played around with a (Hamamya?) 200mm F3.5 prime on my Zenit EM, I believe the 80-320 will more than cover my need for a telezoom. The 50mm is an absolutely superb lens, and fills that special focal...
Posted by Flink on 21/06/2005 - 10:53
M lenses and metering options
Well, not getting an intelligable reply from anyone, I performed some preliminary tests. The lens tested was the 50mm f/1.4 M lens. Earliiest results are negative, even with the contact altered, the M lens seems not to be able to use Matrix metering. A 50 f/1.4 A lens has no problem at all, so ...
Posted by Arthur Dent on 13/08/2005 - 01:14
M lenses and metering options
Well, not getting an intelligable reply from anyone, I performed some preliminary tests. The lens tested was the 50mm f/1.4 M lens. Earliiest results are negative, even with the contact altered, the M lens seems not to be able to use Matrix metering. A 50 f/1.4 A lens has no problem at all, so ...
Posted by Kim C on 13/08/2005 - 02:32
