A new chemically engineered GG
 

Hello all. First of all I just want to say - WHAT A FANTASTIC FORUM!! Well done Chris Hurd for developing this.

For nearly a year now I have been experimenting new ground glass techniques for a static adapter with the help of a biochemist friend and his university's lab equipment. Using various chemicals we have developed our own liquid/wax which makes it very easy to apply onto glass. The most important factors when making gg is in the application and drying technique. We used a mixture of liquid nitrogen and air, some freeze sparays available for pipe work might work for those who dont have access to LN2.

Due to the very promising results we have decided to make a complete adapter although we are not experts in the field of video making and understanding the different settings. Upto now we have had the help of a local cameraman to help us learn the basics but need more help to fully understand what makes the PERFECT adapter.

I am willing to make some custom sized gg for people on this forum (for a small fee of $10 or something for postage and packaging) to try the glass for themselves and possibly make their own static adapter.

What we ultimately aim to do is commercially produce an adapter for the filmmakers market and produce the gg seperately for diy adapter makers.

I am awaiting the delivery of my new Sony Z1 to enable me to start providing demos and stills. If there are particular settings that you would like the adapter or lens to be set at to see what it offers please let me know and I will be happy to provide it. After all, this forum is designed to bring the DV community together and help each other out in producing the perfect equipment and ultimately the perfect footage.

I also want your views on what makes the perfect adapter housing ie: size, thread dimensions, popular adapter sizes, lens mounts etc. For now I am constructing the first adapter around the Z1 with a Nikon F mount.

New GG
 

I'll pay $10 to test out your new GG. Tell me what to do!

Gg
 

Please let me know of a diameter that you would like and email me the details. I am in the process of using my savings to setup my own mini lab/factory as I cannot keep using the university's equipment. I should be ready to start making GG in about 3 weeks. A family relative has a glass company who laser cuts the glass so glass is easy to obtain. It is specifically used in scientific applications, Its not your day to day glazing or picture frame glass but still cheap.

Email is below.

Thanks for your interest.

Tony.

One of the most severe tests is to shoot at about 45degrees off the sun, high thin bright overcast overhead, high contrast low textured environment, light tawny red colour or light olive green colour, SLR lens set at f4 or even tighter.

Most adaptors including the P+S Technik products pretty much clag out at tighter than f5.6 and develop grain, swirl or streaking effects though some cope better than others. P+S Technik recommend against using their adaptor with the lens aperture set tighter than f5.6.

If you can get a wax coat evenly formed on a CD-R sized disk, capable of remaining the way it was sprayed on, you may yet be the hero of the piece.

A wax disk is very definitely the best, but for the one defect I found, severe flicker due to the thickness of the layer around the disk being impossible to control. I'm talking a variation of about 1.5f stops which made my disk virtually unwatchable.

Static glass is a workable method but moving glass seems to be better.

Gg
 

Thanks for your reply Bob. I only call it a liquid/wax because it sets like a wax. The chemicals and liquids used form no part of a wax but so as not to confuse people I just call it a liquid wax. If I used the names of the chemicals and liquids as a name it would probably be entered into the Record Books as the longest name in the world. Looks like I'm gonna have to come up with some fancy name for it so as not to confuse it with actual wax. Im open to suggestions, fancy cool names only. LOL.

What lens would you recommend for this test (Nikon Lenses only for now)?

Hi Tony,

I wouldn't mind giving it a test. Im based in Brighton on the south coast, about an hour from London. I have an array of different types of GG's here to compare yours against, including microwax and the optosigma 1500.

How much in pounds to give it a test drive to a fellow englishman?

Hello

If it is possible I'd like to test your GG, too.

Thanks

P.S. I tried to send you email, but mail delivery failed.

Gg
 

Hi Wayne, I have actually emailed you several times but have had no reply. The reason that I emailed you is because you are close to me being in Brighton (hour away). Anyway about GG, just cost of P+P. Will let you know. Please specify the dimensions that you would like the GG so as I can order the size glass. No matter what the dimensions of the glass we have devised an equation to enable the same amount of liquid administered to each piece therefore every piece should be the same.

Hi
I'm a Director working in London I'd love to give the glass a whirl.
Regards Stephen

Tony,

Ok, i will email you now.

P.S...Hello Stephen, have not heard from you in a while, you must come and give the SGpro a test drive again!!!

Email
 

Oops, sorry everyone. Email address is tony@eldavinci.com for now.

OK, email sent, I hope it gets through this time ;)

Email
 

Got it. That I can do. I am trying to devise a seal so it can be used on rotating systems otherwise due to the constant rotating the glass will eventually separate from the liquid. For the static solution I have had a threaded seal CNC milled to house the glass. The seal itself is threaded so it can be screwed accurately into the the adapter cylinder.

OK,
If you can't do a disk, just sent us a static over, ill test it out for you.

i'd be very interested to see the results of this and possibly the chemical constituents of the substance :p.

Gg
 

Blimey, I should of added a few more zeros to the $amount. I don't mind seeing as it is for testing only. If successful I might make the glass available as a separate product. Due to the big response I have had I will limit the amount of testers as they do take time to prepare but for now I dont mind as I want it tested under many conditions.

Does anyone have any preferences as to what would make the ideal housing for the adapter ie: ring sizes, preferred lens mounts etc?

Substance
 

LOL, I was wondering when someone was gonna ask what is substance is. That would be telling. With the Movietube as soon as the patent became available to the public domain everyone has tried to replicate it. If I am to try and make it a commercially available product then the secret recipe must not be known, just like coca cola. But as I said before the glass will be available to buy separately.

Tony and the rest of you, you're really going to dish out £10 to test out a gg that hasn't been tested yet or seen? This guy could make some quick money whilst you guys are 10 pounds short. Not a bet worth on taking. Be wise.

Tony, show us what you got before you sell something..

some pics would be nice

Gg
 

If you were to read what I said the fee was to cover P+P for testing only, not for profit. $10 dollars was the maximum amount for worldwide postage. UK postage will only probably be between £2 - £3 maximum. Plus I am only going to limit the testers to a maximum of about 10 - 15 people.

As stated, I am awaiting my Sony Z1E. Do not worry, I wont send out testers out until stills and footage is available.

Email
 

Wayne - I just sent you email via DVinfo.

Tony,

It does not seem to be working, i have had trouble with this before.

Please send email to waynekinney@hotmail.com or info@sgpro.co.uk

Email
 

Wayne - Will do now.

I would like to test the GG as well.

Email
 

Wayne - Sent.

Wayne - Got it?

Wayne,

The measurement that you emailed me - Is that what yours is?

Tony,

This is off topic, please email me regarding this.

51.5mm diameter round, and if you can do rectangles, I'd also buy a 25mm X 37.5mm

Actually Thorlabs says to use 50mm optics in their tube, so 50mm instead of 51.5mm (as measured).

Let me know how and where to purchase when you're ready...

Hi Donnie,

Can you email me at tony@eldavinci.com so as I can send you a diagram of what we can send you.

Thanks,

We have sourced the actual manufacturer mount rings for the DiGi35 as opposed to using T-mounts. To get an idea on what the favorites are can you let me know on your next post everybody. Be good to see just how many different mounts people use. Also what diameter your camcorder lens is.

Thanks,

If the bokeh is good I'll buy the glass in a fast second. Out of all the diffusing options, none except the G35's hi?-lux (wax?) deliver quality bokeh, and I think it's one of the qualities that's grossly overlooked in a focusing screen.

GG orders
 

Thank you for everyones interest in the DiGi35 GG. All 10 orders have now been filled.

To those who have ordered the DiGi35 GG, you will be notified by email once the DiGi35 GG is ready to be shipped.

Footage and Stills from my Sony Z1E will be available at www.digi35.co.uk shortly. This will be available before the DiGi35 GG orders are confirmed.

Thanks,

I take exception to that remark :)

Would this work for a revolving GG? I'm in the process of making a Redrock Micro DIY 35mm adapter and wanted to test different GG elements.

Thanks,

Jim

Rotating GG
 

With regards to the rotating option we are devising a threaded seal for the DiGi35 GG to ensure that no glass separation occurs. We shall let you know the progress of this.

Touchè, dude. That's totally some serious mamma-jammin' sweet bokeh goin' on there :)

With regards to the rotating option, what is the most popular diameter? Is it CD size? Our prototype rotating GG with seal is 120mm in diameter with a 25mm aluminium centre seal for mounting.

What diameters are you all using?

I presume the fact that you're trying to make gg's to suit spinners means the grain is too much for static? Just curious.