ND Filters


steloz

Link Posted 14/10/2009 - 21:42
ND filters which are best round or square ?
K-3. K20D, Pentax 18-55mm AL II, Pentax DA 16-45 Pentax FA 50 F1.4, Pentax 18-135 wr, Pentax-AF 80-200, Pentax DA 55-300, DA 10-17, Metz 48

Thordell

Link Posted 14/10/2009 - 22:04
Not sure what you wish to know, do you mean filters in general or just ND, also I take it you mean solid ND and not graduated. Sorry if I am being thick but if you say what you are thinking we can answer you more accurately.

In general I believe square or oblong are better and offer more scope, can be added and removed with easy and quickly but, as I said, it depends on what you want from your filters.
Jackie H
K7, K20D, istDS, Optio SV, ME
Most used glass
50mm f1.4, 60-250mm, 28-80mm,
Sigma 105mm 2.8 Macro & Bertha 50-500
Last Edited by Thordell on 14/10/2009 - 22:04

pink

Link Posted 14/10/2009 - 22:08
it all depends on your shot and budget if you need speed then a pre-fitted nd will do, how ever if you decide to use different lenses and set up then a coking system is the best's at the end of the day it's down to you

James
My Fluidr

"To see in colour is a delight for the eye, But to see in black and white is a delight for the soul" ANDRI HERY

steloz

Link Posted 14/10/2009 - 22:23
sorry its me not explaining very well i want to start doing long exsposure landscapes i have 3 lenses all different filter sizes so looks like square thanks
K-3. K20D, Pentax 18-55mm AL II, Pentax DA 16-45 Pentax FA 50 F1.4, Pentax 18-135 wr, Pentax-AF 80-200, Pentax DA 55-300, DA 10-17, Metz 48

Thordell

Link Posted 14/10/2009 - 22:37
Think you may be right then steloz, the problem with screw on round filter is that they are inclined to become part of the lens and, at least I am inclined to treat them as part of the lens and not consider if I need the filter for a particular shot and if so of what density. With a square or oblong system you can use the filter glass or gel on all lens all you need is different size fitting rings and you can have as many filters fitted as the shot needs adding or removing as you need.
Jackie H
K7, K20D, istDS, Optio SV, ME
Most used glass
50mm f1.4, 60-250mm, 28-80mm,
Sigma 105mm 2.8 Macro & Bertha 50-500

steloz

Link Posted 14/10/2009 - 23:27
not had much dealings with nd filters if you got a nd2 and a nd4 could you use both together and what makes do you recommend
K-3. K20D, Pentax 18-55mm AL II, Pentax DA 16-45 Pentax FA 50 F1.4, Pentax 18-135 wr, Pentax-AF 80-200, Pentax DA 55-300, DA 10-17, Metz 48

Fletcher8

Link Posted 15/10/2009 - 09:46
Hope the following helps! If you are in to landscapes I have found that a Polarizer and some ND Grads are invaluable. I purchased a Cokin P holder and some filters as they were within my budget. However, I have since learned that I should have spent a bit more and gone for a Cokin Z holder and Lee Filters. If you use a wide angle say a Sigma 10mm 20mm you will eventually run in to problems with a P filter holder. One thing I am learning very quickly about photography is that you get what you pay for, although the P sized Cokins have served me well in developing my understanding of using filters and their uses. Fletcher8
Fletcher8.

Anvh

Link Posted 15/10/2009 - 11:48
steloz wrote:
not had much dealings with nd filters if you got a nd2 and a nd4 could you use both together and what makes do you recommend

Yep you can use them together, simply multiply them with each other so for example if you use ND2 and ND4 you will get (2x4=) ND8.
If you use ND2, 4, 8 then you get ND64.

Most of them sell sets, so you can get a holder plus 3 filters for a soft price.
Stefan


K10D, K5
DA* 16-50, DA* 50-135, D-FA 100 Macro, DA 40 Ltd, DA 18-55
AF-540FGZ

ambient housewife

Link Posted 15/10/2009 - 16:32
I have the B&W ND110, a round glass filter, which gives 10 stop light reduction and is probably what you want for loooong exposure landscapes. By itself you can get exposures up to about 30 seconds in daylight, so fantastic water and cloud effects. Not cheap at around 80 for a 77mm. I would advise getting the largest size for the lenses you have and buy a stepping ring for the smaller lens filter sizes. This link for info, you might find it cheaper than this. http://www.warehouseexpress.com/buy-b-w-52mm-nd-110-3-0-sh-filter/p1013505

steloz

Link Posted 15/10/2009 - 20:11
thanks for all advise it was very hopeful and usefuland will take advise given thanks
K-3. K20D, Pentax 18-55mm AL II, Pentax DA 16-45 Pentax FA 50 F1.4, Pentax 18-135 wr, Pentax-AF 80-200, Pentax DA 55-300, DA 10-17, Metz 48
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