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Cameras, Lenses and Accessories: Discuss Silly question about filters and ring sizes...Good evening all, I have a load of Cokin system A filters, the magazine etc which I bought for my ...
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Old 01-01-2010, 16:52   #1 (permalink)
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Silly question about filters and ring sizes

Good evening all,

I have a load of Cokin system A filters, the magazine etc which I bought for my old Pentax SLR. Now the question I have is this:

They worked fine on my old lenses, ring dia 49, however my new lenses have a ring dia of 58mm, I know you can get system A rings in 58mm, but am I going to be encroaching into the focal image of the lens with this system size? i.e. is it too small and restrictive?

Cheers all, and I'm sorry if it's a daft question,

Noel.
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Old 01-01-2010, 17:13   #2 (permalink)
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Re: Silly question about filters and ring sizes

u might just get away with 58mm, you say your lens size is now 58, but what happens if u invest in a new lens and its bigger than 58, my advice is get yourself the P size system it will fit everything up to an 82mm i think
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Old 01-01-2010, 23:36   #3 (permalink)
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Re: Silly question about filters and ring sizes

Noel, here is a brief specification of the Cokin A filter system. You will be able to accomodate a maximum lens ring diameter up to 62mm.

The “A” Series

Designed to accommodate lenses with a maximum diameter of 62mm, the “A” system is, so to speak, the baby of the Cokin system. They are the smallest of the square filters Cokin manufactures and are, generally, used in conjunction with 35mm cameras using normal to minimally long lenses (35mm lenses on up). Many students and amateurs, not requiring the use of super wide lenses, start off with an “A” series filter.



The filters are square, 67mm in width and are made, as all Cokin filters are, from CR39, a quality organic resin. The “A” holder can hold up to three filters at a time giving you ample freedom to create many eye-catching special effects. Therefore, were you to purchase this system, you would need an “A” series holder, the appropriate adapter ring to fit the front of your lens and an “A” series filter(s). This system is lightweight, inexpensive and offers an incredibly wide variety of filters. Once you have the three components of the a system, when you buy a new lens, all you’ll need do is purchase the appropriately sized adapter ring and you’re in business.

It should be noted that “A” filters are not recommended for wide angle lenses.

I hope this helps.Brian

Last edited by brian wright22; 02-01-2010 at 09:42.
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Old 02-01-2010, 18:13   #4 (permalink)
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Re: Silly question about filters and ring sizes

Thanks both.
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