Red 300mm front thread

[Paul Cronin]

Hi,
I am looking to put a UV on the front of my Red 300mm and want to make sure of the dia. Is it 114mm?

Love this lens almost as much as my Red Pro Zoom V2 17-50 which is my go to lens.

 

[Jeff Kilgroe]

You'll have a tough time putting a filter on the front of the 300mm. The original model (with the red ring and integrated support) did not have front threads that I can recall. The revised model, which matches the RPPs, does indeed have some threads on the front. However, those threads are non-standard and are a carry-over from the assembly process. The internal diameter is either 114mm or 112mm, I don't recall, but the thread spacing is not going to match up with any filters out there. Been down that road myself. Your best bet is to use the drop-in filter tray.

You mention a UV filter… Since those are mostly useless by all accounts, I'm assuming you're doing this to protect the front element.

 

[Brian F Kobylarz]

Jeff - you beat me to it! Looked for the old thread when this was discussed and here it is:

http://www.reduser.net/forum/showthread.php?83164-RPP-300mm-Thread-Size-(barrel)


Best results are definitely with the internal 43mm. Pitch is 0.75

 

[Timothy Eaton]

Hi Paul,

Depending on which drop in internal filter you get, it may not fit if you screw it all the way in. If you can find them, the super thin filters are best.

Tim Eaton

 

[Paul Cronin]

Thanks Jeff, Brian, and Tim,

Sorry for the delay been on the road filming. Appreciate the great input and link to the other thread. I will go for a set of the B+W 43 mm filters recommended in the linked thread.

Tim hope you are well. Both lens have been working hard and doing a great job, thanks.

 

[Timothy Eaton]

Excellent Paul. They are great lenses.