Fotodiox RF-EF ND adapter

[John Pike]

Just saw that this dropped. Less expensive than the Canon version and most importantly it's available! Any thoughts on if the quality of the ND glass would be better/worse than the Canon?

https://www.bhphotovideo.com/c/prod...rf_fsn_ndt_vizelex_nd_throttle_fusion.html/qa

 

[Jacek Zakowicz]

Looks like we are back to the middle ages- non locking mount and twin rotating polarizer ND. You guys make it so easy for the manufacturers and dealers...

 

[Tehben Dean]

I tried the Fotodiox R-FD version and it unsurprisingly had significant color shift.

 

[John Pike]

Thanks guys. All I need to hear to know to avoid this product.

I'm picking up a Sigma 18-35mm tomorrow and not sure if I'll add a matt box and a ND filter or maybe skip the matt box and add a screw on variable ND for the front of the lens.

Anyone have any experience with the Vario ND filters by BW or Tiffen. My inclination is to go for BW but I can't imagine the Canon manufactured adapter filters are any better than the Tiffen though I could be wrong.

 

[Christopher A. Bell]

Thanks guys. All I need to hear to know to avoid this product.

I'm picking up a Sigma 18-35mm tomorrow and not sure if I'll add a matt box and a ND filter or maybe skip the matt box and add a screw on variable ND for the front of the lens.

Anyone have any experience with the Vario ND filters by BW or Tiffen. My inclination is to go for BW but I can't imagine the Canon manufactured adapter filters are any better than the Tiffen though I could be wrong.

The only real issue I've seen first hand from the Canon behind-the-lens variable ND adapter, because it's two polarizers, is getting "splotchy"/blocky patterns on some automotive glass, because of the way it's treated.

Quick example from the 'net:

 

[Haven Cousins]

Any variable ND is suceptible to artifact, -whether it's in front of the lens or behind- because it uses polarization to create dimming. (come to think of it, calling a Variable ND an 'ND' is a total misnomer. We've been duped!)
For my needs the Canon will have to be my poor man's Kippertie Revolva until I can justify the cost.

 

[Tehben Dean]

Oh and I forgot to mention the IR contamination through the VND is really bad on Komodo when you stop down very far. The color shift can to a degree be corrected in post but the IR makes it unusable in full sun.