Circular Polarising Filters

[Rejoice]

Hi, I need some advice to the following:

1. Should I buy a normal or slim version ( B+W or Nikon )? Does it really matters?
2. Will I get vinneting if I place it over the B+W UV filter currently on my 17-35mm lense.

Thanks.

[posez]

No time for long answer - short answer is this:

1. The thickness of the frame may cause some vignetting, espcially on wide angles. Best solution is actually to get a step up ring.

2. mounting CPL over UV filter will not cause vignetting, but it would cause significant image degradation due to the space between the CPL and the UV filter, and given the fact that the light now has to pass through two extra layers of glass.

[lsisaxon]

Originally Posted by posez No time for long answer - short answer is this: 1. The thickness of the frame may cause some vignetting, espcially on wide angles. Best solution is actually to get a step up ring. 2. mounting CPL over UV filter will not cause vignetting, but it would cause significant image degradation due to the space between the CPL and the UV filter, and given the fact that the light now has to pass through two extra layers of glass.

For 2, it will if it's a wide angle like the TS mentioned. It has to do with your answer in 1, now the thickness is that of 2 filters.

[Artosoft]

Originally Posted by posez ...it would cause significant image degradation due to the space between the CPL and the UV filter...

.

First time to hear about it.

Regards,
Arto.

[zac08]

Originally Posted by Artosoft . First time to hear about it. Regards, Arto.

Same here...

[lsisaxon]

Originally Posted by zac08 Same here...

Different people define 'serious' differently I guess..

[Fotophilic]

Originally Posted by Rejoice Hi, I need some advice to the following: 1. Should I buy a normal or slim version ( B+W or Nikon )? Does it really matters? 2. Will I get vinneting if I place it over the B+W UV filter currently on my 17-35mm lense. Thanks.

1. If u have the $, and is really serious abt using it (optimum quality equipment needed), why not just go get the expensive ones (slim)? If just play play, Hoya ones will do.

2. Why not u try it out urself when u bought it? I GUESS maybe u will see dark corners on the wide end of ur lense, if u stack the uv and cpl together on ur 17-35. So, just one filter on the lense at any one time. Someone correct me if i am wrong.

Personally, i think we are not doing precision engineering or spectrophotometry. The glass of the filters (reputable brands) are of optical quality. Meaning they allow a great deal of visible light to pass thru it. Slim ones maybe a little better in that matter. Maybe someone can prove me wrong, with some photos to compare?

End of the story, always go for the best if u can afford it.

[ExplorerZ]

Haha, you wan cheap + slim = Marumi.

[Rejoice]

Originally Posted by ExplorerZ Haha, you wan cheap + slim = Marumi.

Thanks for all you advise. Actually I have no issue with budget, I just need to know:

1. between the two brand B+W and Nilkon, which one is preferred ?
2. if it should be the normal or slim type.
3. I know there is both version for B+W, not sure is there also for Nikon?
4. B+W has two types: the higher grade (not slim) which is more expensive (approx. $230)as compare to the slim type (lower grade of glass, approx.$170)
5. I only saw the Nikon and is very slim (approx. $195)

Last but not least: which one should I buy given no budget constraint based on your experience.

Tks.

[ExplorerZ]

Originally Posted by Rejoice Thanks for all you advise. Actually I have no issue with budget, I just need to know: 1. between the two brand B+W and Nilkon, which one is preferred ? 2. if it should be the normal or slim type. 3. I know there is both version for B+W, not sure is there also for Nikon? 4. B+W has two types: the higher grade (not slim) which is more expensive (approx. $230)as compare to the slim type (lower grade of glass, approx.$170) 5. I only saw the Nikon and is very slim (approx. $195) Last but not least: which one should I buy given no budget constraint based on your experience. Tks.

In that case, it doesn't matter... I go with the slim one just incase I need it to use for ultra-wide or FF in the future...

[Rejoice]

Originally Posted by ExplorerZ In that case, it doesn't matter... I go with the slim one just incase I need it to use for ultra-wide or FF in the future...

Thanks, in that case I will go for the Nikon.

[madmacs]

Originally Posted by Artosoft . First time to hear about it. Regards, Arto.

i think the any image degradation is due to the additional layers of glass right?

[philip827]

I use B+W UV filter and nikon slim cpl for my 17-35. No vignetting.

Regards,
Philip

[Rejoice]

Originally Posted by philip827 I use B+W UV filter and nikon slim cpl for my 17-35. No vignetting. Regards, Philip

Thanks very much, you have given me the answer as I have the same configuration. Cheers.

[hemohemo]

Some 2 cents to share.

I actually did stack a UV and CPL (both Hoya) on my 18-200VR on the Navy open house day.

Wide at 18mm & 20mm (on the duck tour!), very obvious vignetting that you'll see 4 dark corners on a 17" screen as 4 triangles with each side of about 1.5cm (at 18mm) & 1cm (at 20mm).

No visible vignetting beyond 30mm though.

The CPL does cut down the 'sparklings' of the sea surface, and makes the sea appear more blue. Without glare of afternoon sun, the pictures actually look richer.

[silverarrow]

Newbie question here,

just bought a D80 with 18~200VR lens, the shop threw in a normal 72mm UV filter, later read from manual, it need the "CPL" version of filter.

Can the normal filter goes with my lens or should i go find another CPL filter, any brand to recommend?

What will happened if i used the NON CPL filter with my lens?

Pls spare me as i'm really new in using dslr.

Thanks

[catchlights]

Originally Posted by silverarrow Newbie question here, just bought a D80 with 18~200VR lens, the shop threw in a normal 72mm UV filter, later read from manual, it need the "CPL" version of filter. Can the normal filter goes with my lens or should i go find another CPL filter, any brand to recommend? What will happened if i used the NON CPL filter with my lens? Pls spare me as i'm really new in using dslr. Thanks

the normal 72mm UV filter is fit on you lens at all time for "protection", CPL filter is needed only when you want to "turn the blue sky bluer, green grass greener, cut down water or glass reflections" etc, the is no reason for you to use CPL filter at all time, cos it cut down two stops of exposure.
and it is recommended not to stack any filters together when any one of filter is redundant.

[Artosoft]

Originally Posted by madmacs i think the any image degradation is due to the additional layers of glass right?

That image degradation due to additional layers of glass is understandable, but read again,

Originally Posted by posez ...it would cause significant image degradation due to the space between the CPL and the UV filter...

Regards,
Arto.