Search results for 'uv filter' - page 315
Grad filter sizes
It depends on what holder you're using. The cokin z-pro is a 100mm holder that holds 3 filters and is rated up to 20mm (35mm format) so 13mm APS-C so comparable holders might be the same. The Z-pro holder can be adapted and it can then easily fit 10mm for APS-C and maybe even wider?
Posted by Anvh on 05/07/2010 - 23:10
Grad filter sizes
Sorry I'm not worried about the 100mm fitting the Sigma (the grad maker I'm looking at, Formatt/Hitech, has a special wide angle holder) - I'm worried about whether on my Pentax lenses (which do not have the Sigma's huge front element) the filters will be unsuitable because most of the gradation is ...
Posted by MrCynical on 06/07/2010 - 00:09
Grad filter sizes
Ah okay, you're worried about the transition. It's actually the angle of view that matters the most not the front element. So for wide angle lenses soft is most of the time better but for normal to long you can get hard ones, you can even special order ones with an razor edge for tele lenses. I...
Posted by Anvh on 06/07/2010 - 00:38
Grad filter sizes
Hi-tech also have a REVERSE ND GRAD, what is that??? Never mind I found it. :)
Posted by Anvh on 06/07/2010 - 00:47
Grad filter sizes
My concern is really whether I'll have sufficient control via using the 100mms: with the darkest section at the very top, I'm not sure I'll be able to use it without having the whole scene darkened on my smaller-element lenses.
Posted by MrCynical on 06/07/2010 - 10:23
Grad filter sizes
Do reverse ND grads get darker toward the bottom rather than the top? Lol! Sounds like it might be an idea to get the filters singly from a shop where you can play with them on your lenses, to be sure you get the most appropriate ones.
Posted by Pentaxophile on 06/07/2010 - 10:30
Grad filter sizes
My concern is really whether I'll have sufficient control via using the 100mms: with the darkest section at the very top, I'm not sure I'll be able to use it without having the whole scene darkened on my smaller-element lenses. You slide them up and down as well as rotate them to put the dark bit wh...
Posted by gartmore on 06/07/2010 - 11:52
Grad filter sizes
You are right - with the 100mm ND grad there is little control when using, say, a 49mm filter thread ;) It becomes more pronounced when trying to use telephoto on the Z-Pro ND grad - it just becomes a controllable ND, rather than a grad. There's a bit of combination between filter size and foc...
Posted by MattMatic on 06/07/2010 - 13:01
Grad filter sizes
Matt I can't really follow you? What does size have to do with the transition from the transparant to the dark part, if you want a real line instead of a controllable ND you just take one with a hard-edge transition right? Do reverse ND grads get darker toward the bottom rather than the top? L...
Posted by Anvh on 06/07/2010 - 13:39
Grad filter sizes
What does size have to do with the transition from the transparant to the dark part, if you want a real line instead of a controllable ND you just take one with a hard-edge transition right? As an example: if I'm taking a sunset photo (let's assume the sun has already gone down to avoid reverse grad...
Posted by MrCynical on 06/07/2010 - 14:23
Grad filter sizes
Stefan - it's easier to try it :D It's the angle of view that becomes the issue. As you take a narrower section of the ND grad on a Z-Pro size filter the range of grad is less. Consider: a 77mm filter with 90 degree AoV will take a large chunk of the 100mm. You'll get a lovely smooth gradient ...
Posted by MattMatic on 06/07/2010 - 14:55
Grad filter sizes
It's the angle of view that becomes the issue. As you take a narrower section of the ND grad on a Z-Pro size filter the range of grad is less. Consider: a 77mm filter with 90 degree AoV will take a large chunk of the 100mm. You'll get a lovely smooth gradient using a large part of the filter. ...
Posted by Anvh on 06/07/2010 - 15:44
Grad filter sizes
I mean would the filter act differently with the DA15mm with his 49mm thread instead of the DA*16-50 at 16mm with 77mm thread? Yes. The distance from the front element to the filter is constant, so for a smaller filter thread it will 'see' less of the filter (for a given focal length). Matt
Posted by MattMatic on 06/07/2010 - 16:02
Grad filter sizes
Matt the only possible thing I can think of is that with larger size lenses (and therefore larger filter thread size) is that the filter is place further away from the lens then smaller lenses and more surface of the filter is inside the AOV. Maybe you mean the same thing but explain it differently...
Posted by Anvh on 06/07/2010 - 16:48
Mono
I ave been playing with this on my K7, I now even have Mono set up as the User settings! I like the in camera setting as it forces me to think like I have B&W film loaded up! A just select the appropriate filter from the menu and off I go! The filter effect can be previewed on the last picture ...
Posted by beakynet on 07/07/2010 - 13:20
Mono
FYI. If you do go down the photoshop route, the best way (IMHO) to convert is using a BW adjustment layer avilable in CS3 onwards. Lightroom also uses a similar system (although not presented as a layer). I like Matt's idea of shooting in jpeg+RAW simply because "seeing" in BW is something that...
Posted by womble on 13/07/2010 - 10:39
Nikon is going EVIL
Flossie, the shutter is actually closed when you've not pressed the release button with (D)SLR so no need for a cover over the sensor because only when you press the shutter dust can go onto the sensor. Sigma has solved this problem by placing a filter in the lens mount on the camera so no dust can...
Posted by Anvh on 10/07/2010 - 20:37
Nikon is going EVIL
Flossie, the shutter is actually closed when you've not pressed the release button with (D)SLR so no need for a cover over the sensor because only when you press the shutter dust can go onto the sensor. Really? so what's this great gapeing hole that sucks up dust/pollen/dirt/hairs/dandruff then... ...
Posted by flossie on 10/07/2010 - 20:47
Nikon is going EVIL
That's the lens mount not the sensor. The shutter is placed just before the sensor so you need to move the mirror up to see it properly. If you don't believe me about the shutter resting position do a 2 second delay with your lens off. With the two second delay the camera will flip the mirror up ...
Posted by Anvh on 10/07/2010 - 20:57
The 77 Macro Limited....
That last shot is lovely. I use the FA77 for macros all the time, since I can pocket a screw-on "filter" that does the job. Saves me lugging around the Vivi 105mm.
Posted by rparmar on 20/07/2010 - 13:13
