Search results for 'sensor cleaning' - page 169
Well what D'you know???
[quote:3496ace15f="JAK"]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 eno...
Posted by Mike-P on 14/06/2017 - 17:46
Well what D'you know???
[quote:3496ace15f="Unlocker"][quote:3496ace15f="JAK"]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 m...
Posted by JAK on 14/06/2017 - 17:57
Well what D'you know???
[quote:3496ace15f="JAK"]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 eno...
Posted by Unlocker on 14/06/2017 - 18:20
Pentacon 135mm F2.8 Bokeh Monster Lens M42 Mount
All Meyer/Pentacon 135s will show what looks like 'something wrong' around the inside, just beneath the front element. There is a thin brass shim in there, the appearance of which gets slightly distorted because it is so close to the edge of the glass element. What is on the images here looks a bit ...
Posted by tonza1992 on 19/04/2017 - 20:18
sigma 150-500 knackered. result- well done sigma.
hi all. I posted a while ago that my sigma 150-500 hsm os wouldn't lock focus. well, I sent it off and they replaced an mr sensor, but they contacted me and said that the lens was still "very soft", and they wanted to send it off to japan for recalibration, all included in the repair price of £146....
Posted by scarr1 on 30/05/2017 - 10:00
How are K1 owners finding their film-era lenses?
I'm just a curious bystander until the K1 drops in price - presumably when the K0.5 (or whatever the FF replacement is going to be called) is released, which is not going to be for a good while yet. I do, however have a bit of a treasure trove of FF lenses from my film camera days, and keen to kn...
Posted by mattie on 08/06/2017 - 17:02
How are K1 owners finding their film-era lenses?
I use a few film era lenses on the K-1, including the SMC Pentax-FA 50mm f/1.4, SMC Pentax-FA 43mm f/1.9 Limited, SMC Pentax-FA 20-35mm f/4 and SMC Pentax-FA J 75-300mm. All are fine. The issue of the way the light falls on a sensor is real enough and modern lenses are designed appropriately. Hav...
Posted by johnriley on 08/06/2017 - 23:57
How are K1 owners finding their film-era lenses?
I do, however have a bit of a treasure trove of FF lenses from my film camera days, and keen to know how people are finding such lenses - IQ, speed, anything of interest - when used on the K1. These film-era lenses are currently sat on a shelf as the focal lengths aren't as useful for APS-C, and I'...
Posted by HarisF1 on 09/06/2017 - 16:18
How are K1 owners finding their film-era lenses?
[quote:3496ace15f="mattie"]I do, however have a bit of a treasure trove of FF lenses from my film camera days, and keen to know how people are finding such lenses - IQ, speed, anything of interest - when used on the K1. These film-era lenses are currently sat on a shelf as the focal lengths aren't ...
Posted by JAK on 09/06/2017 - 16:53
Which wide lens for huge landscapes?
An alternative wide angle lens for huge Landscapes is the Sigma 8-16mm. I’’ve used this on my K3 with some good results. It’s the widest orthogonal ( on fish eye) perspective lens you can get for APS C sensor cameras. It is also great for using close to your subjects to distort reality & warp spac...
Posted by Spider-Man on 16/12/2017 - 13:40
A test of SMC Pentax-FA* 24mm f/2 AL versus Sony Distagon T* 24mm f/2 ZA SSM on Sony A7R II
I tested on Sony A7R II the only two autofocusing 24mm lenses with the speed of f/2 ever marketed: SMC Pentax-FA* 24mm f/2 AL [IF] and Sony Distagon T* 24mm f/2 ZA SSM, The entire test is available at my blog: https://towarzystwonieustraszonychsoczewek.blogspot.com/2017/09/wspoczesne-obiektywy-24-m...
Posted by JaroslawBrzezinski on 04/09/2017 - 19:23
Basic lens for K1
I remember the excellent discussion a few years ago, when the K1 was still in development, about the optimisations in modern DA type lenses, and the great information you provided Daron about the angle of incidence and how light reached the digital sensor. Of course we can't all go out and buy t...
Posted by McGregNi on 14/10/2017 - 15:48
Basic lens for K1
Why has no-one mentioned the very capable FA24-90? It's still rather expensive, even though it's got the ideal walkaround focal range (16-60 on APS-C). Would it not be 36-135 on a crop sensor
Posted by bforbes on 15/10/2017 - 13:39
What lens Are We Waiting For?
[quote:3496ace15f="Kevriano"]Who makes a 500/600 f4 for Pentax? Who's got £8,000 to buy one (or even up to £11,000 depending on the make?) But this one's close and affordable: https://www.srsmicrosystems.co.uk/sigma-50-500mm-f4-5-6-3-dg-os-hsm-lens-pentax-fit.html That's the thing. Pentax would ...
Posted by RobL on 20/10/2017 - 22:51
Dissatisfied with my mid-range zoom
What surprised me was that the dxo tests found the Pentax 21mm Limited to be slightly inferior in sharpness, and some other respects, to the Sigma zoom. Were they tested with the same sensor, or optically bench tested?
Posted by JAK on 23/10/2017 - 21:38
Dissatisfied with my mid-range zoom
What surprised me was that the dxo tests found the Pentax 21mm Limited to be slightly inferior in sharpness, and some other respects, to the Sigma zoom. Were they tested with the same sensor, or optically bench tested? The DxO results that I looked at were both mounted on a K3. The Sigma 17-50 was ...
Posted by OldTaffy on 24/10/2017 - 15:52
Samyang T-S 24mm F3.5 ED AS UMC Tilt/Shift
I can't speak for the Samyang shift lens but it isn't a problem with the Pentax K 28mm shift and the K-1. There's a 4 or 5 mm gap so doesn't really get close to being an issue.. I presume you realise that in liveview the sensor can be shifted to use a normal lens 'shifted' !
Posted by JAK on 22/11/2017 - 17:13
Samyang T-S 24mm F3.5 ED AS UMC Tilt/Shift
What do you make of the Pentax shift lens, John? If you've got any sample images on the K-1, they'll be interesting to see. Those buildings are very close so it would normally be hard/impossible to get them fully in the frame without them leaning backwards. All HDR'd as it was very ...
Posted by JAK on 25/11/2017 - 12:03
A short walk with Pentax-A lenses on K-1
To put the record straight: I am mostly a Nikon and Sony user. A friend of mine has recently kindly lent me a photographic bag full of wonders - an LX body and several manual focus Pentax lenses - he has not used in years. As I was loaned a Pentax K-1, I decided to mate the full-frame flagship DSLR ...
Posted by JaroslawBrzezinski on 29/11/2017 - 00:31
SDM Failure
The SDM on my three year old DA* 16-50 has stopped working. I've tried cleaning the contacts, but it made no difference. Anything else I should try? If not, where's the best place to get it repaired, and any ideas on how much it might cost? Phil
Posted by swarf on 07/01/2018 - 16:11
