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  • Hey all, just changed over the backend after 15 years I figured time to give it a bit of an update, its probably gonna be a bit weird for most of you and i am sure there is a few bugs to work out but it should kinda work the same as before... hopefully :)

RPP 300mm Thread Size? (barrel)

The outside is 117mm.

The 300mm has a filter slot near the PL mount and requires 43mm filters. The lens actually comes with a neutral clear filter.

I got a nice set of 43mm ND's from B&H and they fit perfectly.

I couldn't find the right picture, but this one will give you an idea of the system:

filter-holder-KEN_3967.jpg
 
The front threads on the 300mm are a non-standard size and a byproduct of manufacturing. You really, really, don't want to use them. On long focal lengths like this, you need to use the drop-in tray!

43mm is the size as Lewis points out, they do need to be low-profile filters as the clearance is rather tight. My set of ND's for the RED Pro 300 are Hoya and work well.
 
and to protect the front, Optical clear dropped into your matte box filter folder. I use that on outdoor shoots when not using ND's.

Ron
 
Jeff Kilgroe said:
The front threads on the 300mm are a non-standard size and a byproduct of manufacturing. You really, really, don't want to use them. On long focal lengths like this, you need to use the drop-in tray!

43mm is the size as Lewis points out, they do need to be low-profile filters as the clearance is rather tight. My set of ND's for the RED Pro 300 are Hoya and work well.
Click to expand...

Hey Jeff,

Just bought a Leica APO-Telyt-R 280 f2.8 which has a Leica 112mm filter to protect the front element. It also has a series 5.5 drop in filter ring like the Red Pro, Nikon, Canon etc., but it seems the 5.5 filter size is a bit of an orphan in the drop in filter world. Know of any good sources?

Also, is there any issue using standard filters in a MB in front of the lens at this focal? Do it all the time with an Angie 24-290... I've heard that before, but don't really get why.

M
 
Mark Pedersen said:
Also, is there any issue using standard filters in a MB in front of the lens at this focal? Do it all the time with an Angie 24-290... I've heard that before, but don't really get why.
Click to expand...

Absolutely no issues. I do it all the time.
 
Mark,

The Series 5.5 can be a bit hard to find, but there are a few out there.
B&H can special order those made by B+W.
Schneider cuts all of their filters at their facility on Long Island - They may have an inventory of rings for 5.5 that they can cut some stock glass to fit.
Bob Zupka used to cut all of my special orders at Schneider - was a master at his craft - extremely knowledgeable and always willing to share - his recent passing is such a terrible loss.

If I am not mistaken, the Leica APO also has an additional internal thread for screw-in type filters (Size is E77) - might improve the search results.

Another resource you may want to add to your files is S.K. Grimes in Woonsocket, RI. - They specialize in custom ($$$) manufacturing for cameras - unsure if they cut glass, but they can certainly make new rings.
http://www.skgrimes.com/




Mark Pedersen said:
Hey Jeff,

Just bought a Leica APO-Telyt-R 280 f2.8 which has a Leica 112mm filter to protect the front element. It also has a series 5.5 drop in filter ring like the Red Pro, Nikon, Canon etc., but it seems the 5.5 filter size is a bit of an orphan in the drop in filter world. Know of any good sources?

Also, is there any issue using standard filters in a MB in front of the lens at this focal? Do it all the time with an Angie 24-290... I've heard that before, but don't really get why.

M
Click to expand...

As far as filters in front, Lewis is right - no issues at all for standard filters. If you use any grads, use a HE to retain the effect.
 
Looks like Brian has suggestions for the 5.5's covered. Better than I would've done without looking into it.

Filters on the front are not a big deal for IR cut, ND, polarizer, etc... Some effects filters like grads, glimmer glass, etc.. can produce differing results with longer focal lengths. Many longer lens designs can suffer from focus shifting or dilation as you stack more glass in front of the lens. The Optimo 12X and RED 300 are no exception. A single filter, even using an ND and pola is usually fine. You will get better results on the RED 300 by keeping your ND inside the drop-in tray. If you don't have a filter in the tray, keep the clear glass included one in there as the lens is collimated to account for that layer in the optical path. Running it free of a filter there, can cause a minor difference, most people will probably not notice, but the difference is there.

As always, test, test and test again!
 
Unless you use a Mattebox and normal filters in front of you lens, and as Jeff recommends, I strongly suggest you don't go the front screw in filter route, waste of time and money!

Here's what I bought from B&H, and they work awesome in the drop in filter tray:

BW103C43 43mm #103 Solid Neutral Density (ND) 0.9 Filter
BW10643 43mm #106 Neutral Density (ND) 1.8 Filter
BW10243 43mm #102 Neutral Density (ND) 0.6 Glass Filter
BW10143 43mm #101 Neutral Density (ND) 0.3 Glass Filter

137$ for all 4...

B+W 43mm (COATED) #103 (ND 0.9) FILTER
B&H# BW103C43 : Mfr# 65073024
price:$42,00

B+W 43mm #106 (ND 1.8) FILTER
B&H# BW10643 : Mfr# 65066484Q
price:$45,95

B+W 43mm NEUTRAL DENSITY #102 ND0.6 FILTER
B&H# BW10243 : Mfr# 65072832
price:$24,50

B+W 43mm NEUTRAL DENSITY #101 ND0.3 FILTER
B&H# BW10143 : Mfr# 65072640
price:$24,50

I think you got all the infos you need now!

Best-
 
Thanks Guys!

Especially you Lewis with order info and all!

Having a .3, .6 .9 and 1.8 in 43mm at that price point sounds great. One of the benefits of small diameter filters!

Sorry to hear about Bob. Met him at NAB and found him to be wonderfully informative, helpful and a gentleman to boot.

M
 
OK, so just realized you are listing 43mm filters, which are actually quite easy to find. A series 5.5 filter is 40.5mm.

I can find 40.5mm filters on eBay, but I think those are screw in and probably too thick to use as a drop in. Does anyone know about this?

When you search for 40.5 drop ins, only 2 filters come up (the wrong ones).

M
 
I have a Leica R 280mm lens, not a Red 300. The filter size. Is 40.5mm not 43mm.

M
 
Thanks. I was actually just thinking in terms of a clear flat to protect the front element, but I'm finding that the hood does a pretty good job of keeping it safe. I'm planning to pick up a few 43mm NDs. Love the price for filters at that size, especially after buying 4x5.65 Panavision filters!

Jeff Kilgroe said:
The front threads on the 300mm are a non-standard size and a byproduct of manufacturing. You really, really, don't want to use them. On long focal lengths like this, you need to use the drop-in tray!

43mm is the size as Lewis points out, they do need to be low-profile filters as the clearance is rather tight. My set of ND's for the RED Pro 300 are Hoya and work well.
Click to expand...
 
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