Search results for 'uv filter' - page 358
Hydrogen Alpha Filter
Does any know if you can get a clip-in HA filter for a K5 or K3?? Thanks, Ian
Posted by Spad on 05/12/2022 - 10:44
Hydrogen Alpha Filter
I think that they are only available for Canon Michael
Posted by MHOL190246 on 06/12/2022 - 13:38
Hydrogen Alpha Filter
Bummer... :(:(
Posted by Spad on 06/12/2022 - 18:16
Hydrogen Alpha Filter
Google found one for Pentax K listed . Out of stock, but it does suggest that you might find one if you keep looking. Costs £304 though :shock:. Just one question - why are these things specific to a brand or camera? The emitting hydrogen neither knows nor cares. Steve
Posted by Lubbyman on 06/12/2022 - 19:01
Pentax K3 III Monochrome
I'm guessing it's the same sensor but without the Bayer colour filter so you'll get monochrome images with effectively pixel shift resolution with a single image not 4 consecutive images needed for a colour pixel shift image. Mike
Posted by MikeInDevon on 12/04/2023 - 13:54
Pentax K3 III Monochrome
I'm guessing it's the same sensor but without the Bayer colour filter so you'll get monochrome images with effectively pixel shift resolution with a single image not 4 consecutive images needed for a colour pixel shift image. Mike I don't see the pixel-shift connection. My understanding is that a...
Posted by pschlute on 12/04/2023 - 19:25
Pentax K3 III Monochrome
I don't see the pixel-shift connection. My understanding is that a monochrome sensor is all about the grey shades. I think the point is that for a single shot with the usual RGB filter in front of the light sensors, the light intensity and colour at each pixel position must be calculated as an avera...
Posted by Lubbyman on 12/04/2023 - 21:32
Pentax K3 III Monochrome
Here's an interesting web page about the method and effects of the Bayer filter on resolution/sharpness. I've compared non-pixel-shift vs pixel-shift of the same subject with my K-1 and the improvement in image sharpness is certainly visible. The RAW file size is nearly 4 times (46.7 MB vs. ...
Posted by MikeInDevon on 12/04/2023 - 22:24
Pentax K3 III Monochrome
Removing the usual RGB filter also removes the need to average over adjacent pixels so has a similar effect to pixel shift but, of course, it's only for mono not colour Thanks for the explanation Steve, I see the connection now. So more accurate shades, and sharper images should be created by a m...
Posted by pschlute on 13/04/2023 - 07:43
Pentax K3 III Monochrome
Here's an interesting web page about the method and effects of the Bayer filter Thanks for that link, he explains it very well. The RAW file size is nearly 4 times (46.7 MB vs. 173MB) the non-pixel-shift version even though the image dimension in pixels is the same at 7360 x 4912 pixels. The ...
Posted by pschlute on 13/04/2023 - 07:54
Pentax K3 III Monochrome
Shooting in monochrome works best IMHO if we shoot in mono, and to emulate that I have always set the camera to BW JPEG capture. This gives a different minset when shooting the images, rather than deciding afterwards what to do. The K3 III Monochrome takes that one step further and is great for mono...
Posted by johnriley on 13/04/2023 - 09:36
Pentax K3 III Monochrome
In the official Pentax store here in Spain the monochrome version has a €500 premium over the original price of the standard model, which now has a €300 discount, bringing the difference to €800. That's a very hard sell. is it though? It's a unique camera appealing to a relatively small number o...
Posted by Jonathan-Mac on 17/04/2023 - 11:35
scratch on a lens
I'm sure I read somewhere about filling in such a scratch with black marker pen so it doesn't act like an unwanted star burst filter
Posted by roberrl on 05/05/2023 - 09:19
Filter system DFA 16-50
Yesterday I was lucky enough to be invited to a workshop day by Kase filter systems. At a location in Derbyshire. To take some shots and have a general play about with their peoducts. Except for the fact that the weather was atrocious with torrential rain and high winds. I was then told that they di...
Posted by stub on 05/11/2023 - 20:16
Filter system DFA 16-50
The title references 'DFA 16-50', I assume that should be 'DFA 15-30', in which case: might be of interest. davek
Posted by DaveKitson on 05/11/2023 - 20:37
Filter system DFA 16-50
Sorry yes, my mistake DFA 15-30
Posted by stub on 05/11/2023 - 21:02
Filter system DFA 16-50
Cokin Z Pro should be ok... I have used P Series on my Sigma 10-20mm and get Vignetting at just before 12mm. I actually use X Pro at 10mm as I read about some using Z Pro on the same lens at 10mm, even tho they were advised Z Pro would work, they still got vignetting. I'd say take you camera and ...
Posted by Spad on 06/11/2023 - 00:28
Filter system DFA 16-50
Lee Filters have a dedicated adaptor for the Pentax/Tamron 15-30 - it is part of their SW150 system, so the filters themselves are larger (150mm) and of course more expensive. I've fiddled about with various filter systems over the years but have now settled on this SW150 system - they don't make fi...
Posted by LennyBloke on 06/11/2023 - 08:28
Filter system DFA 16-50
Lee Filters have a dedicated adaptor for the Pentax/Tamron 15-30 - it is part of their SW150 system, so the filters themselves are larger (150mm) and of course more expensive. I've fiddled about with various filter systems over the years but have now settled on this SW150 system - they don't make fi...
Posted by stub on 07/11/2023 - 00:17
Filter system DFA 16-50
I've found the key to making the Lee SW150 system affordable is to have a little patience while shopping around - most of my filters have been purchased second hand at a fraction of the cost of the new RRP. For example WEX currently have 3 ND Grads at £24, £23 and £7 and a Big Stopper for £75. M...
Posted by LennyBloke on 07/11/2023 - 13:32
