Welcome to our community

Be a part of something great, join today!

Register Log in
  • 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 :)

PL Mount 11-16mm f2.8 Prototype, Manual Iris

Had a bit more fun with the Tokina last week -

tokina-bmw.jpg


It's a Wagon - but actually looks cool at 11mm.

Matt Uhry
www.mattuhry.com
 
As promised, here is some real world footage shot with a RED One and the Duclos Lenses 11-16mm.
It wasn't the only lens used, RPPs were there too. But you can pick out the wide shots.
Pretty much anything wide was the DL 11-16.
Click to watch, make sure you watch it in HD.
3586593508_806f6a7c0a_o.png

Oh, and obviously the super slow stuff was shot with a Phantom. But it's still awesome.
 
Wow, that was really fun to watch.

Problem is I forgot to keep watching out for the lenses. Oh well, guess I'll have to watch it again.
 
Matthew Duclos said:
As promised, here is some real world footage shot with a RED One and the Duclos Lenses 11-16mm.
It wasn't the only lens used, RPPs were there too. But you can pick out the wide shots.
Pretty much anything wide was the DL 11-16.
Click to watch, make sure you watch it in HD.
3586593508_806f6a7c0a_o.png

Oh, and obviously the super slow stuff was shot with a Phantom. But it's still awesome.
Click to expand...

Overall footage shot together with RPPs and a little Tokina 11-16mm is just:

AMAZING!!!!!!!!!!!!!!
 
Matt you are right. That 11-16 looks great cut in with all the other lenses.
Nice work. I wish I had gotten the chance to use it for a shot or two that day.
Thanks for coming out and helping make the shoot happen.
 
A couple updates to note:

After T-stopping the lens, we found that it IS a true T2.8.
Previously, we were calling it a T3 just to be safe under the assumption that an f/2.8 would be a little slower when measured.

For those of you in the first batch, your lenses are getting close. Approximately 2 weeks until delivery.
We will have some options available with the lenses.

Currently, all the parts are fitted and everything looks good. All that's left is anodizing and engraving.
There are a few minor changes from previous prototypes...
The focus barrel is now aluminum as well as the focus gear as you can see in the photos below.
The rear baffle is not shown in the photo, but will be part of the final product.

If anyone has any questions, please feel free to ask.

3596858329_66c46e8e65.jpg

3597666050_ebe836126c.jpg
 
they look AWESOME!!!!!. one question though, is that mine?

dying to know if I am in the first batch, shooting a bike race this weekend
and this lens would have lived on the camera at the finish!!

and nice pix too!
 
Paul Hazlett said:
they look AWESOME!!!!!. one question though, is that mine?

dying to know if I am in the first batch, shooting a bike race this weekend
and this lens would have lived on the camera at the finish!!

and nice pix too!
Click to expand...

Paul,

good news and bad news...
Yes, you are on the first batch.
But we still have another 2 weeks of assembly left.
My time is being consumed by CineGear Expo this weekend, but after that, I'll be pounding them out.
 
Matthew Duclos said:
After T-stopping the lens, we found that it IS a true T2.8.
Click to expand...

Really? :cool:

Lookin' really good there. I'm eager to get my hands on this!

Oh, and Mr. Hazlett wanted me to tell you, he's willing to pay extra to have his anodized pink. :beer:
 
Theoretically, this process can be done with almost any lens.
But it isn't a plug-n-play sort of conversion.
This sort of conversion requires many, many hours of research and design.
I don't think we would do anything with the Canon 10-22mm because it is such a similar focal length to our current lens. It would only compete with our own lens and wouldn't be a very smart choice. Also, we chose the Tokina due to its built in optical adjustments and stability while focusing. I don't think Canon makes any lenses these days with adjustments for axial alignment.
 
Wow! How can this lens be both f2.8 and T2.8? You're the expert so I trust you but am confused, I thought T stop = f stop - light loss due to glass. Hence, f stop is how much light entering the lens while T stop is how much light leaving the rear. So I thought you couldn't get f stop = T stop unless you had zero inefficiency, which should only happen when there's no glass present. Confused.
 
Shawn Nelson said:
Wow! How can this lens be both f2.8 and T2.8?
Click to expand...

You're right, Shawn. But I think there's more going on here. Tokina probably produces the lenses to a certain specification and then labels them conservatively as another spec. If I understand everything about the Tokina conversion that has been said, the iris was re-worked to allow for a longer rotation and better manual operation. Perhaps it's possible for the aperture to open up just a bit more under these circumstances. So it could be any combination of these things, or so I would think, that leads to the lens being T2.8.

...Just speculating.
 
Shawn Nelson said:
Wow! How can this lens be both f2.8 and T2.8? You're the expert so I trust you but am confused, I thought T stop = f stop - light loss due to glass. Hence, f stop is how much light entering the lens while T stop is how much light leaving the rear. So I thought you couldn't get f stop = T stop unless you had zero inefficiency, which should only happen when there's no glass present. Confused.
Click to expand...

Shawn,

F-stop is a calculation based on spec numbers. Aperture size and focal length... etc..
T-Stop is a reading of the light actually passing though the lens, a measured amount.

T-stop , in my opinion, is more accurate since it is physically measured with the lens itself.
F-stop does not account for poor coatings or light lost in lenses with many groups.
I always assume that manufacturers account for this sort of thing.
But according to the definition of what "f-stop" is, they don't have to.
 
You must log in or register to reply here.
Back
Top