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ND Filters

Posted 11/11/2011 - 21:24 Link
Sorry 'tis me again.

I need (definitely a need and not a want this time:wink a grey ND filter to enable me to continue my experimentation with long exposures.

Can someone guide me in the right direction - I'm completely out of my depth. There are square ones and round ones and lots of different makes.

Any recommendations will be gratefully appreciated.


Posted 11/11/2011 - 21:51 Link
round ones screw in, ok for full NDs but if you want to use a graduated it can sause problems getting the horizon correct.
Square one come in 3 types,
A,P,Z, in increasing size of holders.

An adaptor ring screws onto your filter thread, a holder fits over the ring, the filter slots into the holder.
Most people go for P sizes, unless you want to go really wide these will do.
My advice; buy rings and holders from china, much cheaper. Then get the best quality filters you can affored; Lee or Cokin.

Look HERE for cheap rings

K5 + 8mm-500mm zooms and primes
Please feel free to play with any images I post.
My flickr: link
Edited by davex: 11/11/2011 - 21:54
Posted 11/11/2011 - 22:07 Link
That's great Dave,

Thank you.

Kind regards
Posted 11/11/2011 - 22:11 Link
I would go for a holder and square filters. For really long exposures start off with cheap as chips welding glass.
Posted 11/11/2011 - 22:18 Link
You should try these if its for long exposures Neutral Density 0.9 Filter or Hitech 85 ND Grad Filter - ND 0.9 (HARD Edge)OR A ND10 these work well Grad Filters work better on a landscape shot when the sun is height but you what to keep the ground as is I hope that helps
PPG link
Posted 11/11/2011 - 22:43 Link
The Lightcraft Workshop Fader 2 is a neutral density filter with variable light stopping capability. You turn the filter like a polariser and it reduces the light variably, all the way up to ND400 level. The more I got into using ND filters, the more I needed in a stack, in order to reduce the light enough. Now I only take the Lightcraft filter.
They are available from Premier Ink, where I bought mine.
Friendly Regards
Edited by grahamwalton: 11/11/2011 - 22:44
Posted 11/11/2011 - 22:58 Link
Thanks Dr.O, handy to know about the welding glass.

Thank you shaun, I think I could do with a grad filter as well that will stop me having problems with high lights in the sky.

They look good Graham I'll look into those in more detail when I've saved some pennies maybe.

I've ordered a cokin holder for the moment because with the adapters I can use the holder on all of my lenses. I wonder if I can borrow hubby's welding mask.

Posted 12/11/2011 - 09:28 Link
SRS do these link no idea if they are any good, if anyone can shed some light I'd be interested too?
"Life is what happens to you while you're busy making other plans" (John Lennon)
Posted 14/11/2011 - 20:41 Link
You turn the filter like a polariser and it reduces the light variably

Presumably they do this using polarisation. Could two polarisers be stacked to achieve the same effect/functionality?
Posted 14/11/2011 - 23:32 Link
In theory yes, but in practice my two cheap-ass polarizers didn't give a great result. Strange colour shift, uneven darkening, and blurriness.
Posted 15/11/2011 - 20:44 Link
my two cheap-ass polarizers didn't give a great result

Fair enough - I've got two of similar provenance to yours, so will look out for a proper ND filter instead!

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