Kood filters on Cokin holders

chorleyjeff · Apr 8, 2007

Using Delta 100 enlarged about 8 times (645 neg to 12" x 16" print) would Kood orange, red, yellow and grey(ish) grad filters visibly reduce image quality?
Cheers
Jeff

Blighty · Apr 9, 2007

If you used them all at once, possibly . Aren't Kood filters made from the same cr39 resin as Cokin? I, for one, would be interested to find out. Those Kood filters are pretty good price-wise. Regards, Blights.

chorleyjeff · Apr 10, 2007

Blighty said:
If you used them all at once, possibly . Aren't Kood filters made from the same cr39 resin as Cokin? I, for one, would be interested to find out. Those Kood filters are pretty good price-wise. Regards, Blights.

Don't know about the resin.
Cheapness is the attraction.
If I was minded to buy Cokin I would ask the same question.
I guess the purists would say buy Lee filters but they are expensive!
Cheers
Jeff

Francesco Triscari · Apr 10, 2007

chorleyjeff said:
Using Delta 100 enlarged about 8 times (645 neg to 12" x 16" print) would Kood orange, red, yellow and grey(ish) grad filters visibly reduce image quality?
Cheers
Jeff

Hi
I have both Cokin and Kood filters. In particular I have 2 grad filters, one from each manufacturer and honestly I cant see the difference in image quality. This is with both 35mm and medium format.
Francesco

Roger Hicks · Apr 10, 2007

chorleyjeff said:
Using Delta 100 enlarged about 8 times (645 neg to 12" x 16" print) would Kood orange, red, yellow and grey(ish) grad filters visibly reduce image quality?
Cheers
Jeff

Dear Jeff,

Everyone I know who has tested filters methodically -- and this includes Ctein who is a better experimentalist than I -- finds no detectable real-world image degradation with any half-decent filter on B+W film. I've never specifically tested Kood but I'd be astonished if they were different from other decent filters.

Cheap polarizers and inferior grey grads may however add unwanted colours (usually green or purple). This is not an attack on Kood -- I'd be surprised if their polas and grads weren't neutral -- but a general observation that I have seen with a few other makes (usually 'own brand' or 'no name').

Cheers,

R.

chorleyjeff · Apr 10, 2007

Roger Hicks said:
Dear Jeff,

Everyone I know who has tested filters methodically -- and this includes Ctein who is a better experimentalist than I -- finds no detectable real-world image degradation with any half-decent filter on B+W film. I've never specifically tested Kood but I'd be astonished if they were different from other decent filters.

Cheap polarizers and inferior grey grads may however add unwanted colours (usually green or purple). This is not an attack on Kood -- I'd be surprised if their polas and grads weren't neutral -- but a general observation that I have seen with a few other makes (usually 'own brand' or 'no name').

Cheers,

R.

Roger
Thanks for your informative and reassuring reply. I had assumed grey grads would probably have some colour bias rather than being a neutral grey - possibly got that info. from one of your books!
Cheers
Jeff

ben-s · Apr 11, 2007

I have a couple of Kood filters, and they have been fine.

However, I have noticed that one of my Cokin ND filters isn't quite neutral.
Unfortunately, I didn't notice until I had had it for quite a while, and the edges were a bit scratched - ie. it couldn't be returned.
I used it to slow the exposure on a waterfall down to about 4 sec, and when I looked at the photos, I noticed a slight greenish-brown tint.
I've made further tests, and it would seem that it is definitely not quite right.

chorleyjeff · Apr 11, 2007

ben-s said:
I have a couple of Kood filters, and they have been fine.

However, I have noticed that one of my Cokin ND filters isn't quite neutral.
Unfortunately, I didn't notice until I had had it for quite a while, and the edges were a bit scratched - ie. it couldn't be returned.
I used it to slow the exposure on a waterfall down to about 4 sec, and when I looked at the photos, I noticed a slight greenish-brown tint.
I've made further tests, and it would seem that it is definitely not quite right.

Is there such a thing as a true black or grey in colour photography?
Anyhow doesn't matter much with Delta 100 but might do if used with slide film!
Cheers
Jeff

Kood filters on Cokin holders

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