Search results for 'sensor cleaning' - page 167
Which legacy lenses for K1?
None of those, sorry! Most, or should that be all, of the old legacy film lenses will work with the K-1. Obviously results will vary so you need to define 'best'. One lens may produce an effect the photographer likes whereas someone else thinks otherwise. An APS-C example of this is the Sigma 10...
Posted by JAK on 01/02/2017 - 16:34
Which legacy lenses for K1?
Its a common confusion, I've certainly succumbed to it myself, and have been corrected on this forum. But yes, I believe it is the distance to the subject that determines the 'perspective', not the focal length. So a crop in from, say 14mm to 20mm, will result in the exact same perspective as if th...
Posted by McGregNi on 10/05/2018 - 17:43
Which legacy lenses for K1?
One of the benefits of the K1 sensor is that you can crop in post processing and still retain an excellent image, so if there is a bit of vignetting that can be trimmed. However, an APS-C lens will probably show loss of image quality outside its designated image circle so even if the vignetting is m...
Posted by RobL on 10/05/2018 - 21:36
Focal length - APS-C v FF 15mmltd v Sigma 10-20
The short answer is yes The designation on the lens does not change 15mm is 15mm. What changes things is whether the lens is on a full frame or APSC sensor. Full frame it is 15mm. APSC it acts like a 22.5. (15 x 1.5)
Posted by bforbes on 24/08/2016 - 20:17
Focal length - APS-C v FF 15mmltd v Sigma 10-20
Yes, it would be the same. 15mm is 15mm whichever lens you use. It's the size of the sensor that makes a difference to the field of view. To get the same FOV as a 15mm lens on APSC you would need a 22˝mm lens on a full frame sensor - hence the 1.5 crop factor.
Posted by percy on 24/08/2016 - 20:20
HD Pentax D FA 28-105
I gave the 28-105 an outing with my K-1 yesterday when I went to the Ryedale Folk Museum which was open free as part of the Heritage open days weekend. An exterior view: 100% crop from same the image: The 100% crop stands up well in its own right. Obviously that's mainly down to the ...
Posted by JAK on 12/09/2016 - 15:00
HD Pentax D FA 28-105
Philip, some good examples at different focal lengths, I think demonstrating that it's a very consistent lens over its range. That close-up at 105mm is good and sharp, and I'm also very pleased with things that close, and with the excellent minimum focus distance as well. What's happened to the ...
Posted by MrB on 13/09/2016 - 17:08
HD Pentax D FA 28-105
[quote:3496ace15f="McGregNi"] Being a 135 format lens, will always be presenting the best quality part of the image circle over the smaller rectangle of the APS-C sensor? It's actually pretty good for resolution right to the edges and doesn't seem to suffer with chromatic aberration, at least not i...
Posted by JAK on 13/09/2016 - 20:32
pentax lens on sony nex 5?
I have a Fujifilm X-M1, a camera which is very similar to the Nex ones, and I use it only with lenses with other mounts as I have no Fuji lenses. I have various adapters but as most of my lenses are Pentax, that's mostly what I use on it. The combination is always manual focus and for exposure can...
Posted by Jonathan-Mac on 06/11/2016 - 08:27
Glass for a K1
Nothing wrong with the budget 50mm f1.8 and 35mm f2.4, if cost is a concern. +1 to this also Are you saying that these DA lenses cover the FF sensor? (Not that I am looking. Would like a K1 with better AF, maybe my arrow of choice points the opposite way to the O/P?)
Posted by pgweber on 07/12/2016 - 09:34
Glass for a K1
Generally, DA lenses do not fully cover the full frame sensor. There are a couple that Pentax say do, the 200mm f/2.8 and 300mm f/4 I think are amongst them. Full frame lenses will have FA somewhere in the descripition, so the 50mm f/2.8 macro is a full frame lens also.
Posted by johnriley on 07/12/2016 - 10:13
Glass for a K1
Well I received the K1 that I ordered from WEX as an "open box" which was cheaper, although if I keep the K1 I'm tempted to return it and use the SRS offer to buy a new one instead (and support SRS). Initial thoughts are that the body is excellent, seems well laid out, nice to use and the new fan...
Posted by edin_togger on 11/12/2016 - 12:49
Pentax DA* 200 and 300mm
Focal length is focal length and cannot change. What will change is the field of view...ie what you see through the viewfinder. So the 300 on a crop sensor will have the same field of view as a 450mm lens would show on a full frame sensor. Both the DA200 and 300 were released for a crop senso...
Posted by pschlute on 27/12/2016 - 10:12
pre-setting FL on manual zoom lenses
I did not know it is better to have the dialed in FL below the likely zoom used for the shot, than above. Why is that though (not questioning it, my brain just needs to understand why :lol: ) The camera detects movement (camera shake) and adjusts the sensor to compensate. When it knows you are usin...
Posted by pschlute on 31/12/2016 - 05:22
FA 35 F2 AL v D-FA 50 F2.8 Macro
What you're asking for is something quite subjective. But there is a site where older Pentax lenses are compared which would put a numerical value on those comparisons rather than opinion. See: http://www.takinami.com/yoshihiko/photo/lens_test/pentax_35.html You'll see that the 50mm macro lens pea...
Posted by JAK on 02/02/2017 - 13:01
Maybe a possibility for The newer Pentax Dslr's
* It is not possible to convert a lens to a mount that SIGMA has not released. Presumably means (to clarify further) it's not possible to convert a lens to a mount other than that for which the lens has already been released in. And therein lies the problem, given Sigma and many others are no...
Posted by richandfleur on 28/02/2017 - 22:14
DA 17-70 vs DFA 28-105
I want a comparison of the DFA on the K1 with the 17-70 on a cropped sensor. You answered my question overall. Thank you.
Posted by sebas77 on 16/02/2017 - 16:50
Pentax 55-300mm f/4.5-6.3 da Plm Wr
I find that with the 50% greater resolution and no moire filter everything is seen in much more detail including of course sensor noise. How much sharpening/ contrast you apply can have effect too. i reckon 1600 ISO on K3 similar to 3200 on my old K5 for High ISO noise. I have auto noise...
Posted by wvbarnes on 20/02/2017 - 14:21
D FA★50mmF1.4
The days of 6 or 7 element 50mm lenses are long gone at the high end of things. With all the aspheric elements, ED and Super ED glasses and highly complex designs, plus inbuilt focusing motors, lenses are getting bigger. Ah, progress! Bigger, heavier, more expensive, larger filters, more to go wr...
Posted by George Lazarette on 23/02/2017 - 11:00
Wide Angle lens for Building & Architecture Photography.
Just yesterday I received in the post a Pentax SMC 28mm f/3.5 shift lens which should prove ideal for architecture photography. Possibly its not normally wide enough for APS-C though. Having said that, are you aware of the shift feature of the sensor when using liveview which can be used with any ...
Posted by JAK on 09/03/2017 - 11:17
