Caprock anti moire filter
- Thread starter Andreas
- Start date
I order mine the other day. It better work.
I received mine today. Bad news. The 2.0 doesn't seem to work for the 5D. I'll do some more test tomorrow, but it looks like we need a 1.0 or a 1.4. It seems that it is fine for the 7D, but not for our camera. I think the sensor size does make a difference with these filters. Oh well, back to America it goes.
hyalinejim
Well-known member
Thanks for being the guinea pig on this one, yoclay. Before you send it back, do you notice different effects at different focal lengths from the same strength filter?
Actually, I am doing my Magical Mysterious Metallic Spaghetti Strainer Test, and at all focal lengths it does not eliminate the moire. I have also noticed that the Canon lens have a stronger Color Saturation for the rainbows than the old Contax Zeiss lenses. I am certain that this is the multi-coatings in play.
I also am able to see moire at x5 and x10 magnification. So it makes me wonder if sensor windowing really would eliminate this form of aliasing.
I also have tried it combination with a polariser and with a back net filter. This is mostly on the Zeiss 35 f1.4 lens. Nada. Don't work.
Maybe the strainer situation is so extreme though that nothing will cut it. Will try some buildings tomorrow. Here in Paris, the metal shutters and often the iron balconies can create aliasing too. What worries me is that this shows up on the longer lenses as well, for which there may be no solution. Just try and do the Eiffel Tower under those conditions!
I also am able to see moire at x5 and x10 magnification. So it makes me wonder if sensor windowing really would eliminate this form of aliasing.
I also have tried it combination with a polariser and with a back net filter. This is mostly on the Zeiss 35 f1.4 lens. Nada. Don't work.
Maybe the strainer situation is so extreme though that nothing will cut it. Will try some buildings tomorrow. Here in Paris, the metal shutters and often the iron balconies can create aliasing too. What worries me is that this shows up on the longer lenses as well, for which there may be no solution. Just try and do the Eiffel Tower under those conditions!
yoclay:
As far as 7D goes the samples show that even in extreme situations the filter works. You should have no problem even with Eiffel tower. I have mailed Caprock and told them I want to exchange for 1.0 and I hope someone will report on 1.4 Most probably has to do with the different sensor size and I bet that the smaller the filter patterns the better.
Andreas
As far as 7D goes the samples show that even in extreme situations the filter works. You should have no problem even with Eiffel tower. I have mailed Caprock and told them I want to exchange for 1.0 and I hope someone will report on 1.4 Most probably has to do with the different sensor size and I bet that the smaller the filter patterns the better.
Andreas
ROCKMORE
Veteran
Sorry to hear about another failure in the search for moire eradication.
What is the difference between the 2.0 and the 1.0 and the rest of the Caprock filters?
Are they just different size patterns on the filter?
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ROCKMORE
Veteran
So at this point it's still experimental to test and find out which filter performs best on different size sensors. (Along with international shipping from the US to Paris and back.)
Hey if Caprock is following this and other "Caprock" promotional threads, maybe it would be a good idea if you guys team up with an owner of a 5D & 7D in your area and run tests your filter line with these cameras.
This could help in fewer returns on filters that don't work properly, and cut down on shipping costs, and lost time for you and us.
Everyone with a 5D & 7D sooner or later will probably need one, and more likely to buy if they know which one will do the job out of the box day one.
I will be looking forward to a standard chart listing all the filters with photo grabs before and after to see how great they work. From what I've seen so far they can really save an important shot from being deleted.
Just a suggestion, but would be a big plus in customer relations and general good will.
Thanks in advance
Basically, it has been determined by another post-er that the Caprock filters are very limited in their application. Pretty much only good for the wides. For the 7D the 2.0 seems to provide just the right balance between softness and moire elimination. We are hoping to find the same with the 1.0 or 1.4 for the 5D, but no guarantees. I think the relationship to sensor size may be more of a determinant than focal length, but don't quote me on that. So it might come down to 1 filter for each camera, useful in a few limited circumstances...
Caprock is not testing their filters with specific cameras, they wait our results and yes they are monitoring the forums (conclusions from the conversation I had with Alan Schwartz, their president) Really, I don't see how they will team up with hundreds of different camera users. A flexible attitude towards returns and exchanges is the proper thing to do and they doing it. I am in Europe too, no problem. Cheers to Caprock and I hope we will get to the bottom of this.
Andreas
Andreas
ROCKMORE
Veteran
It would be nice to have a guideline. I was really just referring to one user with a 5D and 7D for a few side by sides. (A team like Barry and Caprock for example.) Its' not really off limits for us to ask the manufacturer for some assistance with their product.
Since Alan Schwartz at Caprock is monitoring this, maybe he can answer my question for himself.
By the way, something very important that I found against moire. The Picture Style Profiles make a huge difference. When I created a profile based around neutralising a middle gray as much as possible in an image and then turned down the sharpness, contrast and saturation, it killed a lot of the rainbow aspect of the moire. Pumping all that back up in post, did not reveal a rainbow. This says to me that chromatic aberration is playing a large part in these artifacts, which is then picked up and exaggerated by the artificial sharpening and saturation in camera.