A new ground glass idea

O

orkan

Member
Hello everyone

I recently discovered a device called "rain deflector". İt is e device to avoid the raindrops on to the lens. İt has a revolving filter in front of the lens. And I thought this technique could be used for 35mm adapter solutions.
Now we only have spinning or vibrating options (in case of non-static). The motor can be placed somewhere else.
You can download the demo of the deflector here
http://www.spintec.co.il/256.wmv

The logic is to revolve the ground glass instead of rotating or vibrating, this way I think the spinning GG solutions may meet the the size of the vibrating GG solutions.
The only thing worrying me is that the central point of the glass is not actually moving, but it's only a small spot and it's not a problem with that rain deflector.
I made a basic drawing of the idea.

untitledhr6.jpg


If you ask why I'm not building one of these, because I'm not a handy man. I just imagine ;)
I hope this helps, and if you decide to mass produce one of these, please remember me :)
 
This is a great solution. If you could put a GG in there, you would suddenly have a DOF adapters - but, the FL would need to be adjusted with spacers, so I am certain DIY'ers could pull it off. Great find.
 
The basic idea is very good and it may work. But the motor consumption of 750mA is very high if I understand correctly. And I think its noisy too. You can hear that revolving in the video. Btw how much cost that thing?

Daniel
 
As I remembered.. This idea was tried several times at the starting age of DIY DOF adapters.. But because of "statice" central point - it was rejected..

-I am not sure, but I think that even Mini35 constructors tried that first..
 
Leteeci,

He shot the music video 'Akala - The Edge' and the film 'The Riddle' were shot using that design.

Nick then changed his adapter to a spinner, I sent him the SGpro ground glass so the rest of his stuff is a similar SGpro setup.
 
Wayne Kinney said:
Leteeci,

He shot the music video 'Akala - The Edge' and the film 'The Riddle' were shot using that design.

Nick then changed his adapter to a spinner, I sent him the SGpro ground glass so the rest of his stuff is a similar SGpro setup.
Click to expand...

Thanks for info, Wayne !!

I saw pixelloft videos before and I was amazed, but didn't know what they use for shoot..

The edge Rocks! I couldn't see any "dead center" spot.. but probably because of video-compressionn..and dark sets..

Thanks again, cheers

david
 
Here is what I was wondering, why no offset the GG so it is not focused on the center. It will take a bigger GG, but this may work on a small camera like the HV20.......
 
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