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Step-up Rings ?
I Have a 77mm B&W Kaesemann Circular Polarizing filter and would like to use it on a lens with a 67mm filter size. Is it Ok to use a step-up ring to accomplish this or do I have to spring for another very expensive filter ?Longshot..

Comments (5)

DWMJr wrote:.

I Have a 77mm B&W Kaesemann Circular Polarizing filter and wouldlike to use it on a lens with a 67mm filter size. Is it Ok to use astep-up ring to accomplish this or do I have to spring for anothervery expensive filter ? .

Use a step-up ring. You may not be able to fit the hood on the lens, but hoods are inconvenient when using a polarizer and you can shade the lens with your hand..

Seen in a fortune cookie:Fear is the darkroom where negatives are developed..

Comment #1

Yes, a step-up ring is the best way to go. The only possible concern would be if your lens with the 77mm filter size is a wide-angle one. There might be some vignetting. However, if you're using a polarizer on a wide-angle lens and shooting vast expanses of the sky, you'll likely get uneven color in the sky...

Comment #2

DWMJr wrote:.

I Have a 77mm B&W Kaesemann Circular Polarizing filter and wouldlike to use it on a lens with a 67mm filter size. Is it Ok to use astep-up ring to accomplish this or do I have to spring for anothervery expensive filter ? .

As others have said, yes but the hood could be a problem..

I bought the same filter in a 72 mm to fit my Sigma 18-50/2.8, together with a step-up filter so I could use it occasionally on other lenses. Unfortunately I didn't buy a 67-72 step-up so when I subsequently bought a 70-200/4 I couldn't use the polariser on it. However, I can't recall any occasion when I have needed it - in fact robbing the 70-200/4 of two stops of light is just about the last thing I want to do! If that's why you are asking about 67 mm, I would definitely postpone buying the filter until you see whether you really need one..

But I've recently bought a 10-22 which takes 77 mm filters and I definitely want a polariser for that - and as it is a bigger size I have no option but to buy another filter. I'm waiting for the new Hoya HD filters to become available (should be May sometime) then I'll probably get one of those, subject to price...

Comment #3

Steve Balcombe wrote:.

But I've recently bought a 10-22 which takes 77 mm filters and Idefinitely want a polariser for that.

You know about the wide angle polarizer effect, right? Take a look at the second image on this page:.

Http://www.luminous-landscape.com/tutorials/polarizers.shtml.

While the text is correct that 40mm on 66 is about 24mm on 35mm, 66 format is square so not as wide horizontally for the same diagonal field of view. And the image has been cropped to narrow the view further. Best as I can tell the horizontal view in this image is no wider than a 35mm lens would give you on 35mm. It may actually be longer than this, because I can't know if the shot has been cropped vertically as well (which would need more crop horizontally to keep the same aspect ratio)..

At any rate the effect in the shot is about what you'd see at 22mm on your lens. At 10mm the sky will be very uneven..

You may or may not like this effect, but you should at least be aware of it before shelling out the dough for a new polarizer..

Seen in a fortune cookie:Fear is the darkroom where negatives are developed..

Comment #4

Nickleback wrote:.

Steve Balcombe wrote:.

But I've recently bought a 10-22 which takes 77 mm filters and Idefinitely want a polariser for that.

You know about the wide angle polarizer effect, right?.

I do, but thanks for mentioning it..

It's just one of the (many) challenges of using an ultra-wide. It won't be apparent all the time - if the sun is very high in the sky for example, it is much less noticeable. And not every wide angle shot includes a vast edge-to-edge expanse of sky - street shots being perhaps the most obvious example. And of course I won't always be using it at 10 mm - the problem gradually decreases as you cut down the field of view towards 22 mm..

No, I am certain that I need a CPL for this lens, but I will have to use it judiciously...

Comment #5

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This question was taken from a support group/message board and re-posted here so others can learn from it.

 

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