Polarizer Question

[Kris_2020]

Can someone tekk me which Circular polarizer this is (b+w 77 slim c-pol mrc)
I am not sure if it is this one
http://www.bhphotovideo.com/c/product/133003-REG/B_W_66026598_77_mm_Circular_Polarizer.html

or this one

http://www.bhphotovideo.com/c/product/133012-REG/B_W_65016930_77_mm_Circular_Polarizer.html

Also when turning the polarizer while holding it to the lcd screen the slim b+h polarizer gets dark and black while the B+W 77 mm Kaeseman Circular Polarizer Multi-Resistant Coating (MRC) Glass Filter barely does anything. It basically just turn a bit more blue but it never gets as dark or black like the other one which makes me think that it doesn`t do much. I thought that the kaeseman was a superior polarizer filter. How come there is such a big difference?

[sapearl]

The cheaper filter is NOT multicoated and I would NOT recommend getting it. Under extreme bright and point light source lighting conditions it will likely add glare/flare and degrade your images. Multicoating is designed to minimize if not eliminate that effect.

I'm not quite sure I understand how you are "viewing" the effects of turning the CPL. I would look through the viewfinder, slowly rotate it clockwise, and note any darkening effect to the sky, or reduction in glare. I would have a harder time judging it via the LCD, but that's just my older eyes :rolleyes: - Stu

[Kris_2020]

Well when holding the filter to the lcd and turning it the cheaper one clearly turns black where I can barely see through it. This also shows in the viewfinder. The Kaeseman barely does anything. In the viewfinder almost impossible to see but when doing it in front of the lcd I can see it turn blue but still not as dark as the other one.

[sapearl]

That's an interesting test Kris - I've never tried it that way so I don't honestly know if that's a valid way of checking the effect. My instinct says no only because you're modifying a scene that has already been "electronically translated" (LCD screen) and I don't believe that has the same effect as direct viewing through the viewfinder. Again, just a gut feeling.

Looking at your gear lineup, I don't believe you need the slim version. I use mine mostly on the 24-105 as well as a 17-40 on my old 5D and there is no vignetting. The Kaesmann offers extra edge sealing for moisture. Mine does not have that.

[Denny G]

Turn the Kaeseman around and look at it through the other side.

[Kris_2020]

Well that is why I got the Kaeseman because I thought I don`t need the slim version. It just seems that the slim version does more.
This to me is also noticeable in the viewfinder.

[Bob_A]

What lens are you using this with? If it's not an ultra-wide you don't need a slim filter. With the slim variety there are no front threads, which is why they supply a push on cap. This is the one I have for my 24-70 f/2.8L:

http://www.bhphotovideo.com/c/product/9778-REG/B_W_66044844_77_mm_Circular_Polarizer.html

It's multi-coated ... excellent circ pol. I believe you only need the Kaeseman version if you do foul weather shooting (it's edge sealed).

[Kris_2020]

Turn the Kaeseman around and look at it through the other side.

Damn now I feel really stupid :oops:

Well at least I learned something new. Thanx :D

[Bob_A]

Turn the Kaeseman around and look at it through the other side.

Exactly! :lol:

[Kris_2020]

What lens are you using this with? If it's not an ultra-wide you don't need a slim filter. With the slim variety there are no front threads, which is why they supply a push on cap. This is the one I have for my 24-70 f/2.8L:

http://www.bhphotovideo.com/c/product/9778-REG/B_W_66044844_77_mm_Circular_Polarizer.html

It's multi-coated ... excellent circ pol. I believe you only need the Kaeseman version if you do foul weather shooting (it's edge sealed).

I use it with the 24-105 mostly but also with the 100-400
So do I need a slim version for the 24 or no?

[Kris_2020]

By the way what does the MRC stand for?

[Bob_A]

I use it with the 24-105 mostly but also with the 100-400
So do I need a slim version for the 24 or no?

I'm pretty sure 24mm isn't wide enough to require the slim version, even with full frame. At least that's what I recall from the conversations I had when I bought mine.

Maybe one of the other full frame shooters can confirm.

[argyle]

You don't need a slim polarizer (at least as far as B+W goes) for any of the lenses in your list...the standard F-Pro version will work just fine. You don't even need a slim filter for the 10-22/xxD combo either. The edges of the Kaesemann are sealed to prevent moisture from getting in between the glass discs. Is it really necessary? All depends on what type of environment that you shoot in. Then again, if you buy the filter from hvstar, the price differential between the Kaesemann and non-K versions is pretty negligible (about $10 or $20), so it would make sense to get the K version (at least to me).

'MRC' stands for multi-resistant coating.

[Jon]

Well when holding the filter to the lcd and turning it the cheaper one clearly turns black where I can barely see through it. This also shows in the viewfinder. The Kaeseman barely does anything. In the viewfinder almost impossible to see but when doing it in front of the lcd I can see it turn blue but still not as dark as the other one.
If it's blacking out the LCD when viewed from either side it's not a circular polarizer. A circular polarizer, which you need for an EOS or most other AF SLRs (not just digital ones) will only exhibit that blacking out in one direction.

[sapearl]

No you don't.... use the "regular" with mine all the time with no trouble. MRC= Multi Resistant Coated.

I use it with the 24-105 mostly but also with the 100-400
So do I need a slim version for the 24 or no?