In-built ND-filters: tech. details about their mechanism?

C

cici

Well-known member
Can anybody explain me about the ND-filters inside DVX100:

- how tall are they?

- where are they positioned exaclty? (Position ON and positon OFF)

- how do they technically get pivot into the incoming light?


Thanks for explanations and for PICTURES OF ND-on / ND-off MECHANISM!
 
cici,

I don't have any pictures yet, but we have a DVX100 in the shop right now that is getting a new lens. It won't be a problem to take the old one apart and take a few pic's for you. I will also post an explanation of the lens and ND-filter layers.

I will post on Monday. :thumbsup:


Andrew Hoffman
Senior Operations Manager
Specialized Communications
20940 Twin Springs Drive
Hagerstown, MD 21740
www.spec-comm.com
1-800-359-1859
 
Hey, You've got a DVX lens for scrap? Would you mind running a little experiment?

The world needs to know if the DVX lens is made out of real glass or just plastic.
The only way to do this is to scratch each element with a knife, then post pictures.

Let the rumor mongers see the light! :thumbsup:
 
thisiswells said:
Hey, You've got a DVX lens for scrap? Would you mind running a little experiment?

The world needs to know if the DVX lens is made out of real glass or just plastic.
The only way to do this is to scratch each element with a knife, then post pictures.

Let the rumor mongers see the light! :thumbsup:
Click to expand...

I will see what I can do. Most of the time customers like their old parts back. This may or may not be an issue. We will see what we can do. :thumbsup:


Andrew Hoffman
Senior Operations Manager
Specialized Communications
20940 Twin Springs Drive
Hagerstown, MD 21740
www.spec-comm.com
1-800-359-1859
 
Definitely cool! I'd love to know for sure whether the lens is glass or plastic! I'd ask Jan but I don't think that's something Panasonic is willing to openly release.

I've always been of the opinion the DVX lens is likely "plastic" (as in polymer). It would make the most economic sense in my mind and provide a good image (just have to design slightly differently than glass due to refractive index)
 
Thanks a lot Andrew! And: WOW! This is just THE moment to get answered all this questions about like the "plastic" rumour...

Perhaps you could measure it or take a photo besides a ruler...

I really can't imagine where it is hidden until it is needed and how it is getting on it's place for work...

Thanks for your time, Andrew!

Cici
 
Shaw said:
I've always been of the opinion the DVX lens is likely "plastic" (as in polymer).
Click to expand...

Let's not forget: cokin filters, used by many professional photographers are made of plastic too.... Plastic is not just "bad" and "cheap".... probably an expensive plastic is better than a bad glass.... but anyway we just would be happy, not to have a "plastic-filter".... wouldn't we?

- In case it IS plastic, I'm sure, Panasonic would call it: "high-class-optical-polymer"
 
Why would you want a glass lens? I'd rather have that high-tech, years of research, plastic thing, than something made out of dirt.

:)
 
Oh, well, hmmm....I emptied my head of all my German to make room for Romanian. There's only so much room in there...

Pupici. :)
 
dmbdvx said:
Roughly translated - you should be proud that you own good german glass ?!
Click to expand...

yes! - lol - I'm not a German, but GenJerDan as a German should be proud that enterprises all over the world want german glass for telescopes, microscopes, lenses, filters etc. . Names like ZEISS and Leica are witness for good glass quality. Glass is made out of sand, that's perhaps the reason for GenDerJan's ironic allusion - but once having seen the manufacturing for a good glass e.g. from Jena, with enldess politure, calibration and multi-coating - one's mouth just stays open and a just closes for pronouncing a "wow"....

Now I wonder whether one day industry will be able to produce some plastic that might have better optical parameters than glass for use in lenses / filters. It's possible and certainly would be much cheaper than the endless procedure for a first-class glass-lens.
 
The vast majority of all optical glass is manufactured by Schott, including the glass used for building Zeiss lenses. Even so, optical glass accounts for less than 1% of their total production. Did you know there are actually specific beaches with "optical grade" sand and others that aren't!? (I'm sure Dan already knew this!)

I don't think lenses would be much cheaper if they were made from polymers because they would still need to be ground and polished using traditional methods, just like optical glass. While there are some molded glass lenses on the market (B270 is often used because of its low melting temperature) the molded lens does not compare to the quality of a ground and polished lens, at least in my observation...
 
thisiswells said:
I don't think lenses would be much cheaper if they were made from polymers because they would still need to be ground and polished using traditional methods,
Click to expand...


Yes, but they could theoretically be cleaner than glass, as they are synthetic. Am I wrong? - It's like the difference between a genuine diamond and a synthetic diamond. Depending on laboratory environement, the polymer could probably have less inclusions and that would make it more transparent. But that's just my theory...
 
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