Search results for 'uv filter' - page 112
Sigma 70-300 apo lens , Advice needed.
Took the advice of all posts, went through all the relevant ones. Custom Setting for Sharpness at +3 No filter on the lens Aperture at 11 or close to it Boosted ISO to 800 P mode Turn off SRS Pictures look good and acceptabily sharp. Wont have to junk the equipment or spend any more mo...
Posted by surfseen on 04/10/2010 - 06:05
Sigma 70-300 apo lens , Advice needed.
Excellent pictures. Were they taken handheld. Do you use a filter. Do you use SRS. Have you got the custom settings in camera boosted for extra sharpness. Any other particular settings.
Posted by surfseen on 07/10/2010 - 02:40
Sigma 70-300 apo lens , Advice needed.
Well took some outside photos. Even though the day was a bit overcast, the photos came in sharp through the wole zoom range. Using a UV filter as well. And shake reduction off. Will try again with shake reduction on. But it looks like the Pentax lens will be the keeper.
Posted by surfseen on 12/10/2010 - 22:41
Sigma 70-300 apo lens , Advice needed.
Excellent pictures. Were they taken handheld. Do you use a filter. Do you use SRS. Have you got the custom settings in camera boosted for extra sharpness. Any other particular settings. Thanks :) sorry for the slow reply. Yes handheld , no filter. settings in the middle apart from sharpness on ...
Posted by Transit on 14/10/2010 - 12:07
Slim?
Do you need a slim filter for the DA*16-50? I know there is a guide out there somewhere from Pentax but can't find it :(
Posted by Anvh on 07/08/2010 - 20:56
Slim?
General opinion seems to be that a slimline filter is not needed. Can't find the official listing you mention, but plenty of other references to it elsewhere. I have a normal CPL on my 17-70 with no problems, though that is of course only a 67mm filter - isn't the 16-50 a 77mm?.
Posted by Gwyn on 08/08/2010 - 10:18
Slim?
Al right searched an hour for it yesterday and now i found it at the official Pentax site *sighs* Here it is It's about the Pentax polarisers, but they say type A is larger and type B is thinner so it makes sense to say type B is a slim filter. For the DA*16-50 & DA17-70 they say you should...
Posted by Anvh on 08/08/2010 - 10:43
Slim?
According to them every lens above 17mm have vignetting except the DA16-45 with the Type B polarisers filter. It doesn't really matter since the slim version of the Käsemann MRC is €175 and the normal €165 so for those €10 I'm not going to take the risk.
Posted by Anvh on 08/08/2010 - 15:14
How useful are....
I on the other hand use them all the time. They are stored back to front in the bag but are put on as soon as the lens is used. I never used to bother but have had so many shots ruined by glare that I use them all the time now. I have lost a couple of the little slide out bits though - dump...
Posted by Gwyn on 12/08/2010 - 21:20
How useful are....
Not sure I follow the 'protection' statement. For protection I usually keep the camera in a case, nowadays I don't even use a daylight filter on the front of a lens, that, though, is a different discussion. Surely anything that makes a lens longer is going to increase the chance of damage.
Posted by Hardgravity on 13/08/2010 - 09:21
Pentax-M 28mm f2.8 (MK2) disassembly
I've dismantled a M28/2.8 recently and couldn't shift the filter ring either, even after trying some of the above suggestions. I resorted to drilling two diametrically-opposed 1mm holes in the ring, unscrewing it using a caliper and then filling the holes with black epoxy afterwards. The plas...
Posted by GrahamW on 19/08/2010 - 18:23
Pentax-M 28mm f2.8 (MK2) disassembly
Sorry, I meant finishing ring, not filter ring.
Posted by GrahamW on 19/08/2010 - 18:24
Sigma 10-20mm Lens for Pentax K20D
I have the Sigma 10-20 4-5.6 it's a very good lens, works perfectly on the K20D, non HSM but not really needed on a lens I use for lanscape:D Less distortion than the newer f/3.5 version and smaller filter size 77mm as opposed to 82mm, apparently sharper at the edges too. The Pentax 12-24 is very g...
Posted by johnwhit on 26/08/2010 - 09:55
Sigma 10-20mm Lens for Pentax K20D
I've got 12-24 & 10-20 Sigmas. My reservation about the 12-24 is it's bulbous front element (flare problems & you can't put a screw on UV filter on it) but it doesn't have the distortion of the 10-20. That said I love the 10-20 which is always part of my travel kit.
Posted by wadna on 29/08/2010 - 07:34
SMC PENTAX-F 1:1.7 50mm vs fixed aperture zoom lens?
The term 'fixed aperture' applies to lenses like the various 500mm mirror lenses which have their aperture fixed at f8, or similar, and can only be changed by the addition of ND filters. Peter I'm having troubles to understand how a ND filter can alter the aperture, could you please enlighten me?
Posted by Anvh on 01/09/2010 - 23:45
SMC PENTAX-F 1:1.7 50mm vs fixed aperture zoom lens?
The term 'fixed aperture' applies to lenses like the various 500mm mirror lenses which have their aperture fixed at f8, or similar, and can only be changed by the addition of ND filters. Peter I'm having troubles to understand how a ND filter can alter the aperture, could you please enlighten me? I ...
Posted by flat4 on 02/09/2010 - 05:45
SMC PENTAX-F 1:1.7 50mm vs fixed aperture zoom lens?
[quote:3496ace15f="Mannesty"]The term 'fixed aperture' applies to lenses like the various 500mm mirror lenses which have their aperture fixed at f8, or similar, and can only be changed by the addition of ND filters. Peter I'm having troubles to understand how a ND filter can alter the aperture, coul...
Posted by Mannesty on 02/09/2010 - 08:38
SMC PENTAX-F 1:1.7 50mm vs fixed aperture zoom lens?
Aren't there ways to make the opening smaller like a diaphragm does, maybe in form off a filter or will that give vignetting? No, the aperture is fixed. However, because of the zooming the aperture of the Pentax 400-600mm does change. Just a little point, do you really mean aperture or the f-numb...
Posted by Anvh on 02/09/2010 - 18:26
SMC PENTAX-F 1:1.7 50mm vs fixed aperture zoom lens?
Aren't there ways to make the opening smaller like an aperture does, maybe in form off a filter or will that give vignetting?. Well the Lensbaby series comes with aperture discs to do this - and I think certain old lenses (video ones?) used to as well.
Posted by MrCynical on 02/09/2010 - 18:36
SMC PENTAX-F 1:1.7 50mm vs fixed aperture zoom lens?
MrCynical I've being playing with the idea to make a filter that goes from dark to clear on the edge to make the bokeh softer. I've tried to print one but the plastic didn't hold the inkt so need to get some special type of plastic that can be used with printers. :) I know some people used the ...
Posted by Anvh on 02/09/2010 - 18:56
