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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 :)

It‘s a great camera, but... some odd quality issues on #112

Curran Giddens said:
Sometimes, when things "stick," allz you need is a lil' bit o' lube....
Click to expand...

bingo... and we just switched to a better lube that works better with the thread pitch so you guys shouldn't need to worry about that anymore.
 
digitalfx said:
Phil,
Just to clarify...as best I can determine reading this thread it is only 1 report of "stickyness"...not reports. Before everyone freaks out, lets wait on more information from additional users.
Click to expand...

This is good news, you don't have any issue with your mount at all.

Sebastian
 
digitalfx said:
Phil,
Just to clarify...as best I can determine reading this thread it is only 1 report of "stickyness"...not reports. Before everyone freaks out, lets wait on more information from additional users.
Click to expand...

Good point. :) However, there seemed to be a legitimate question regarding the wisdom of mating of steel and aluminum. I am hoping that thread is picked up by someone on the Red team.

Phil
www.artbeats.com
 
ready2roll said:
This is good news, you don't have any issue with your mount at all.

Sebastian
Click to expand...

no, I didnt say that...I have the old mount an dont have any issues with it.
All I was saying is, so far it appears you are the only one reporting the problem with the new mount. So before mass hysteria ensues...lets get more info and make sure its not an isolated problem.
 
The camera itself is becoming battle hardened with many intrepid productions, using it and gathering feedback. The new mount however is batting 1000 but hasn't been off the bench yet.

What is lacking in the conversation about this mount is any empiricle information about the performance of the new mount itself.

If it can be set within tolerances and maintain FFD over time. Then it's good.

If must be adjusted constantly and cannot be trusted within the normal limits of wear and tear, then it's a problem.

Just do us all a favor and let us know what you discover, so that we can prepare ourselves or as the case may be....relax.

Ian
 
Jarred Land said:
bingo... and we just switched to a better lube that works better with the thread pitch so you guys shouldn't need to worry about that anymore.
Click to expand...

Ok, maybe I am giving too much legitimacy to previous posts. But there was concern that lube can "gas out and smeer the low pass filter". So, I assume that this is not an issue with your new lube? Does the lubing happen only once at manufacture, or is it part of maintenance?

Thanks,
Phil
www.artbeats.com
 
Phil Bates said:
Good point. :) However, there seemed to be a legitimate question regarding the wisdom of mating of steel and aluminum. I am hoping that thread is picked up by someone on the Red team.

Phil
www.artbeats.com
Click to expand...

Phil,
it looks like it is mating aluminium and aluminium here. But I think at this point this decision has to be accepted. Jim had explained that there have been good reasons for this. That is fine with me.

Looking foreward to the get the lube, Jarred.

Sebastian
 
questions

questions

Jarred Land said:
dont assume...

:shiftyph34r:
Click to expand...

yeah, never assume.
i assumed non-americans and non anglo-saxons could have their RED lenses for professional use and i was SO wrong.

Sorry if I'm being a bit harsh but probably i have to cancel my order but i still cannot afford Cooke (or other cine lenses) and i feel a bit left alone in the desert.
The fact that RED lenses where available are part of my decision of ordering a RED camera in the first place, because everything i needed was within my budget.

Now i would like to know WHY RED decided to not support non-american and non anglo-saxon market, and also would like to know if a serious solution can be reached, (like third parties engravings) or if future "RED PRIMES" and/or "Red Zoom f2.8 CF 18 - 85mm" will have metrics option and/or both markings.

Just seeking answers to my questions.

Thanks

PS: if the thread now is just about PL mount i can move in a specific thread, sorry if i insist, but i will continue until i get some answers.
 
Tim Le said:
Hi all,

I don't want to second guess RED's material selection choice for the lens mount since I don't know their exact requirements. However, my background is as a mechanical engineer in the aerospace industry so I just wanted to add some thoughts to the discussion.

7075 is definitely a strong material when you also need it to be lightweight. It's one of the strongest aluminum alloys and like mentioned earlier, it's commonly used on aircraft structural members (bulkheads, beams, etc.). I've used a version of it on a high speed impeller for a helicopter transmission oil cooling fan. It's also harder than the more garden variety aluminum alloys like 6061 or 2024, but it's not as hard as heat treated steel or stainless steel. On the Brinell hardness scale, 7075-T6 is around 150 while a heat treated stainless steel, like 17-4PH H1025, is 300+.

Heat treated stainless steel, like 17-4PH H1025, can actually be stronger than 7075-T6. Ultimate tensile strength for 17-4PH H1025 is about 185 ksi while 7075-T6 is 83 ksi. For comparison, standard aluminum alloy like 6061-T6 is around 38 ksi.

Also, stainless steel has a lower coefficient of thermal expansion than aluminum so I think it would be more temperature stable than aluminum?

The main advantage of 7075 aluminum over stainless is its strength to weight ratio since it's about 1/3 the weight.

The 7075 lens mount might actually be fine. Stainless is just nice to have.

Again, I don't know RED's exact design requirements, but just as an observer, I probably would have chosen stainless because the lens mount is a frequently used threaded connection and from my limited experience these types of threads tend to be steel. I've seen aluminum on aluminum threads before, but only on things that are infrequently taken apart (at least for the aerospace industry). Also, with stainless you don't need to do any surface treatment to it that can wear off, other than passivation, which is a cleaning process to prevent corrosion. The tradeoff with stainless steel is more weight and cost, though.
Click to expand...

Interesting post, but PL is not a threaded mount.
 
Valde said:
but i still cannot afford Cooke (or other cine lenses) and i feel a bit left alone in the desert.
Click to expand...

If you can afford the Red zooms, you can afford a Cooke zoom. Still don't understand the problem here.
 
new prices

new prices

Dominic Cochran said:
If you can afford the Red zooms, you can afford a Cooke zoom. Still don't understand the problem here.
Click to expand...

hello there,

obviously i'm comparing new lenses prices, not used.

Cooke Zooms vary from $60,000 to $ 42,500 approx.
RED Zooms vary from $9,975 to $6,500.00

cheers
 
chuck colburn said:
Yes it is. Infact the RED PL mount has two different threaded parts. One the locking ring itself and the other the flange focale depth adjuster.
Click to expand...
yes, it has threaded parts but it's not considered a screw in mount.
 
Valde said:
non anglo-saxons .
Click to expand...

Time out...

Anglo Saxon? What century are you in Valde? Think you'll find your friends the Romans put an end to the Anglo Saxon's quite a long time ago.

While we're at it, and correct me if I'm wrong, but didn't the Romans gave us the Mile (mille passus) and the Pound Weight lb (libra) both imperial measurements. :innocent:

So remember when you point that metric digit of yours, there are four pointing right back at ya!

...okay, and now back to Red talk
 
Phil D said:
Time out...
Anglo Saxon? What century are you in Valde? Think you'll find your friends the Romans put an end to the Anglo Saxon's quite a long time ago.
Click to expand...

hehe, sorry, i think i just literally translated an italian phrase in english!

here in italy we use the word Anglo Saxon Countries indicating UK etc...
i wasn't sure about the word when i wrote it (never found it written anywhere), now i guess it's kind of OLD FASHIONED :biggrin:
 
I don't have much experience with pro mounts but for what it's worth our lens went on very smoothly last night. There was a bit of noise, but no play, gap, or any other noticeable issues. Only time will tell if any durability issues come up, but we have a big schedule ahead of us, so I'm sure well give it a good work out.
 
Hey Valde,

How about Anglo-American as a compromise.

On a serious note, I do feel your pain, but wouldn't it still be cheaper in the long run for you to buy Red's lens and get the metric markings added, than go for the Cookes?
 
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