Search results for 'uv filter' - page 278
A colour problem with my K5
Here is the result of setting my K5 to neutral. The lens was my 35mm DA f2.8 LTD. with a soft filter on front. The oranges are orange again. This is the exact colour the rose was. I had this problem for about a week and it was quite absenting. I thought I need to send the camera in for repa...
Posted by Horst on 03/04/2016 - 13:03
Infrared white balance on K3
Having trouble setting custom wb with the ir filter on K3, it just keeps saying unable to complete, any ideas as to what im doing wrong. im going to wb settings, custom wb, holding the filter over lens, pointing at the grass and 30 sec later unable to complete ? Any thoughts welcome. Derek
Posted by derek897 on 26/04/2016 - 11:27
Infrared white balance on K3
An IR image is bound to be all red because the IR part of the spectrum is beyond red. If I use an R72 filter on my K-5 I would expect it to be red. I don't see how a custom WB works in this context, because there is no WB.
Posted by johnriley on 26/04/2016 - 17:19
Infrared white balance on K3
How it seems to work, to me anyway (I might be wrong) is like this, Custom wb set by taking overexposed shot of bright grass, as bright green foliage is white in infrared bw, when you take a shot with the external filter on it recognises that the greens are supposed to be white ish and removes the...
Posted by derek897 on 26/04/2016 - 18:30
Infrared white balance on K3
Hi Derek The custom WB is different but I don't think you'll get satisfactory results in colour with this filter, it will always look unnatural and not in a very pleasant way. I would tend to stick with a BW conversion; I know this isn't what you're aiming for, but to get better results you are p...
Posted by davidstorm on 27/04/2016 - 21:51
Infrared white balance on K3
:idea:Hi Derek The custom WB is different but I don't think you'll get satisfactory results in colour with this filter, it will always look unnatural and not in a very pleasant way. I would tend to stick with a BW conversion; I know this isn't what you're aiming for, but to get better results you...
Posted by derek897 on 28/04/2016 - 07:46
Infrared white balance on K3
you take a shot of your nice green lawn in bright sunlight, without the filter, then use that image to set the WB then attach the filter to take the IR shot. You get blue skies by swapping the blue and red colour channels. there are some good tutorials on youtube on using an R72 filter.
Posted by redbusa99 on 28/04/2016 - 09:59
Infrared white balance on K3
you take a shot of your nice green lawn in bright sunlight, without the filter, then use that image to set the WB then attach the filter to take the IR shot. You get blue skies by swapping the blue and red colour channels. there are some good tutorials on youtube on using an R72 filter. Cheers, as...
Posted by derek897 on 28/04/2016 - 12:49
Infrared white balance on K3
you take a shot of your nice green lawn in bright sunlight, without the filter, then use that image to set the WB then attach the filter to take the IR shot. You get blue skies by swapping the blue and red colour channels. there are some good tutorials on youtube on using an R72 filter. I've heard o...
Posted by petrochemist on 28/04/2016 - 13:57
K3II weird colour casts from frame to frame
This is not a filter, it's a JPG rendering engine option. You don't see it until you actually review the JPGs. I turn it on accidently quite often when toggling between the AF select points and regular 4 button controller functions. It's a poor design imo.
Posted by Mag07 on 28/08/2016 - 22:58
K3II weird colour casts from frame to frame
This is not a filter, it's a JPG rendering engine option. You don't see it until you actually review the JPGs. I turn it on accidently quite often when toggling between the AF select points and regular 4 button controller functions. It's a poor design imo. :D:D:D Problem solved, thank you. Yes...
Posted by fatspider on 28/08/2016 - 23:20
Tuesday Teaser
There are filter removing devices that grip the filter equally all the way round. Part of the problem is that if we use our hands we distort the filter shape which makes it harder to remove. Also, try a rubber mat, placing the filter face down onto it. It grips, enabling better leverage when remo...
Posted by johnriley on 20/12/2016 - 11:51
Tuesday Teaser
I usually make a ring out of Blu-Tac and stick it onto a formica worktop it grips the filter. Sometimes if the filter is slightly oval squeezing it at the widest point is enough to free it. --
Posted by Algernon on 20/12/2016 - 12:58
Tuesday Teaser
use a rubber placemat/mug stand press firmly down on that it gives you all round the filter grip.
Posted by SteveEveritt on 20/12/2016 - 20:20
Tuesday Teaser
If you go in a specialty store that caters to the disabled person, get an "anti-slip placemat". You just put your lens/filter combo on it, with the filter in contact with the placemat. Then, applying light downward pressure on the lens, unscrew it. The thing is so "grabby", nothing will slip on it...
Posted by pentaxian450 on 21/12/2016 - 01:58
Tuesday Teaser
Hi All Thanks very much for all the suggestions, as initially mentioned, I was looking for a cure rather than a fix when it gets stuck again, I'm pleased to report the O Rings work a treat, An 80mm diameter O ring with 4 dabs of superglue to hold it in position. fixed inside the reducing ring ...
Posted by Chrism8 on 29/12/2016 - 13:18
Exposure problems with Irix 15mm lens
I thought I should update this topic which I started in case it has put off prospective buyers! The problem I reported appears to have disappeared. It has not reoccurred for months. I contacted Cameraworld about the original tests and they said to return the lens to them for examination by Irix...
Posted by phb on 03/03/2018 - 11:29
IR / Mono anomaly
It looks like Newton's rings. However, it could be a diffraction effect from the sensor combined with the sun being just out of shot? Try using the AA filter simulator in similar circumstances. Alternatively, it could be from over adjusting levels. This usually results in posterisation effects. I...
Posted by johnriley on 12/08/2017 - 07:51
IR / Mono anomaly
Thanks all for the above. Could be, Jak. I've tried other routes in Elements but it's still there, to a greater or lesser degree. Newton's Rings as in slide glasses, John? Would that not have to be on the final image plane, the sensor? It's not on the jpeg before processing.... Sun was over t...
Posted by coker on 12/08/2017 - 13:37
K&F fish eye adapter
Some of the reviews reported a similar problem: https://www.amazon.co.uk/Fisheye-Concept%C2%AE-Pentax-Digital-Cameras/product-reviews/B015E2780I/ref=cm_cr_dp_d_hist_1?ie=UTF8&filterByStar=one_star&reviewerType=all_reviews#reviews-filter-bar Which lens are you using it on. also K-1 or APS-C? Do yo...
Posted by JAK on 15/08/2017 - 19:15
