Search results for 'sensor cleaning' - page 168
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 Yecora99 on 09/03/2017 - 13:49
Replacement standard zoom
Hi all After managing to drop my 16-45 and bork the AF mechanism I'm after a replacement walk around standard zoom lens. I'm taking more and more photos in bad weather so I'm looking at the weather-sealed lenses, which I've not had any experience of. I'd be keen to hear opinions on whether t...
Posted by mattie on 09/03/2017 - 17:00
You poo-pood my comment
As I have said, you cannot break the laws of physics! All the helpful posts above show you that the LAWS OF PHYSICS produce DIFFERENT images in the setups of the type that you describe in the first post. The only exception would be if each of the two images showed ONLY a single 2-dimensional p...
Posted by MrB on 18/03/2017 - 21:13
Can you help me identify what it is?
If that particular element is cemented in place it may be something to do with the glue, can't say as I've ever seen fungus like that so I think it's safe to assume it's not. I wouldn't worry too much about it, if your using this on a cropped sensor DSLR you wont be using the outer portion of the...
Posted by fatspider on 13/03/2017 - 14:10
Can you help me identify what it is?
Thanks guys. They seem glue to me. You were right about no issues on cropped sensor but I have no K1 to try with, so hopefully no issue on full frame as well.
Posted by pengbai on 14/03/2017 - 08:18
Can you help me identify what it is?
Thanks guys. They seem glue to me. You were right about no issues on cropped sensor but I have no K1 to try with, so hopefully no issue on full frame as well. I think if you can afford a K1 you can afford a better copy of that lens :D
Posted by fatspider on 14/03/2017 - 13:30
Can you help me identify what it is?
Thanks guys. They seem glue to me. You were right about no issues on cropped sensor but I have no K1 to try with, so hopefully no issue on full frame as well. I think if you can afford a K1 you can afford a better copy of that lens :D This particular lens is K28/2 Hollywood :(
Posted by pengbai on 14/03/2017 - 13:33
Which is better - the DA* 50-135 used on K-3 or the Tamron 70-200 on the K-1?
I'd use the K3 for telephoto stuff and the K1 for wide angle pictures. You get full value for your wide angle lenses with a 35mm size sensor. You might need a strong servant to carry the kit around, though!
Posted by bwlchmawr on 16/03/2017 - 19:27
Which is better - the DA* 50-135 used on K-3 or the Tamron 70-200 on the K-1?
I'd use the K3 for telephoto stuff and the K1 for wide angle pictures. You get full value for your wide angle lenses with a 35mm size sensor. You might need a strong servant to carry the kit around, though! This seems to be my target. The K-1 goes to the beautiful places and my Q system goes everywh...
Posted by HarisF1 on 16/03/2017 - 19:35
Basic Lens Kit for K-1
Currently in the big bag (loaded for a walk last week that didn't happen) K1 plus... FA 20-35/4.0 K 28/2.0 F50/2.8 Macro DA*55/1.4 FA*85/1,4 FA135/2.8 A*200/4.0 Macro And preferred selection for the little bag (non hernia edition) K1 plus... K28/2.0 F50/2.8 Macro A*85/1.4 F 1.7x AF c...
Posted by LennyBloke on 28/03/2017 - 21:13
Cheap lenses for portraits
a few thoughts. 1) Eye tracking AF is super useful for this, but it's not on any Pentax yet. My Pentax DSLR's are notorious for catching the eyebrow and not the eyes. Live view with focus peaking gives better results for me. 2) I don't know how I feel about buying something like a K-1 and then...
Posted by richandfleur on 06/04/2017 - 23:47
Cheap lenses for portraits
a few thoughts. 1) Eye tracking AF is super useful for this, but it's not on any Pentax yet. My Pentax DSLR's are notorious for catching the eyebrow and not the eyes. Live view with focus peaking gives better results for me. 2) I don't know how I feel about buying something like a K-1 and then...
Posted by sebas77 on 07/04/2017 - 11:00
Cheap lenses for portraits
I'm at that weird stage too. I got the FA85 a few months ago and the FA77 doesn't get as much use whenever the big one is in the bag (and the bag got much bigger after getting the 60-250 so there's always space to carry it). Other than the fast primes, the best portrait lens I've used was the DA*...
Posted by HarisF1 on 30/04/2017 - 10:53
Cheap lenses for portraits
I don't know how I feel about buying something like a K-1 and then not having any money for lenses. It's the lens that does the work of focussing the light on the sensor, so it's pretty important in the grand scheme of things. I find that professional photographers tend to value the lenses over th...
Posted by cyberjunkie on 10/05/2017 - 15:16
Cheap lenses for portraits
I have a SMC Takumar 135mm F3.5, which takes wonderful portrait images. It's a bit long on a crop sensor camera, but on a full frame I think it would be great. It cost me £20. I've done what Gareth describes above and fixed a M42 adaptor to it permanently so it's as convenient to use as a true ...
Posted by davidstorm on 11/05/2017 - 22:23
Cheap lenses for portraits
I have a SMC Takumar 135mm F3.5, which takes wonderful portrait images. It's a bit long on a crop sensor camera, but on a full frame I think it would be great. It cost me £20. For 20 pounds you can't go wrong! :) I don't remember if has the same optical layout of the later version with K mount....
Posted by cyberjunkie on 14/05/2017 - 13:16
Sigma 105mm macro f1.2
The exposure time should be longer with tubes as you're getting less light to the sensor. With a different set of tubes you may find that the aperture reading is more accurate.
Posted by HarisF1 on 10/04/2017 - 00:24
Sigma 105mm macro f1.2
The exposure time should be longer with tubes as you're getting less light to the sensor. With a different set of tubes you may find that the aperture reading is more accurate. Not in this case. The 2nd set of tubes have no contacts, and the lens is locked wide open even when set on aperture ring. S...
Posted by derek897 on 10/04/2017 - 11:24
Sigma 150 -500 os off to japan for repair.
I sent the above lens to sigma as it wouldnt autofocus properly. Kept hunting, and when it did "lock" focus, it was way out. I sent it in and they said it needed a new mr sensor. Theyve had it for 3 weeks, and ive just received a call that it is still "very soft", so the repair was not 100 percent s...
Posted by scarr1 on 12/04/2017 - 14:23
Well what D'you know???
What is it that anyone would want extra from a K3iii that either doesn't already exist or couldn't be added with a firmware update to the K3ii ? A focussing system with tracking / predictive performance similar to a D500, that would have stopped me switching systems. Fair enough. Is there anything ...
Posted by JAK on 14/06/2017 - 17:38
