gerry wrote:Nice one Beeb.
What material did you use for the CPL holder? looks like black nylon or something.
The holder is machined from aluminium alloy - 2024-T3 to be exact. It's a bit of a softer grade than ideal (5056 or 6064 would have been preferable), but it shouldn't really have any negatives as the item will not be exposed to heavy loads or any abrasives (well, hopefully not!
) - It was then hard anodised black (which hardens the outside of the item and adds corrosion and wear resistance).
W G wrote:Great application of craft Beeb but what would possess anyone to buy a good lens and then put a Cokin filter on the front of it?
In the film days I had hundreds and hundreds of dollars worth of filters - especially grads and polarisers - and used them constantly. When I went digital I bought a Circular Polarising filter and a UV filter in the two sizes I needed for my lenses. It is that long since I used the UVs I don't even know where they are any more and the Polas hardly ever get a run unless I want to see through water in a swimming pool to show tiling details for instance.
Colour correction and balancing is far more facile in post-processing ..... and probably more accurate and localised.
Haha, their CPL's are actually quite good (well to me at least...). Ever-so slight
brownish cast, but not enough to be any issue at all. For ND and ND-Grads I use Lee resin filters, which are excellent for my purposes. Basically no colour-cast, and don't seem to have any other detriment on the image (The Cokins were another matter altogether though, colour cast and slight loss of sharpness, and the HiTech filters I tried are far, far worse - horrible blotchy flaring nightmare they were...)
As I shoot mainly outdoors/landscapes - the CPL is a huge benefit to me. While colour can be 'recreated' in post-processing - being able to clearly define the bubbles and foam on the surface of a rainforest stream, showing the the depth and colour present beneath the surface reflection, adjusting the reflections coming off rocks or even just to show the true colour of trees or ferns without any adjustments in post makes it a go-to item for me.
For reference - The girlfriend has one of the very high-quality Hoya CPLs, and in my opinion I prefer the Cokin. The Hoya produces a much more mild effect than the Cokin, and otherwise the image quality is comparable.