I have asked this question is several threads and haven gotten answer yet.

Is it 72..82???

Just bought the Letus Extreme and need to know if I need a step up/down ring.

TIA!

Doesn't this make a difference to the design? Just wondering out loud.

Jus.

Doesn't this make a difference to the design? Just wondering out loud.

Jus.


Not sure what you mean. The Letus design?

77mm. pitch 0.75 mm (on lens).

Not sure what you mean. The Letus design?

I meant, isn't there a reason why folks like P+S make different devices for your camera depending on chip size or am I missing something? Surely an imaging device designed to project light to a 1/3" capture chip will not natively work as well with a chip which is significantly bigger in area? Ie. you'd not be using the full extent of the larger chip, right?

Not sure what you mean. The Letus design?

The Letus website has no information about field of coverage, but I guess is designed for 1/3 inch sensors and smaller. You should ask them whether it will cover a 0.5" sensor with vignetting.

EDIT: I think there isn't a problem. The camera lens is focused at infinity using a supplementary lens to video an image on ground glass, so provided the ground glass is uniformly bright the primary lens takes care of coverage.

Daniel,

Where did you buy the Extreme? If it was from www.letusdirect.com then you were given a choice of 72mm or 82mm thread size. If you didn't choose one, it defaults to 72mm.

Daniel,

Where did you buy the Extreme? If it was from www.letusdirect.com then you were given a choice of 72mm or 82mm thread size. If you didn't choose one, it defaults to 72mm.


Yeah..I bought it from their website and just chose 72mm not knowing what the EX was at the time. Adapter rings arent a big deal but i'd rather not use one if I don't have to.

So it better to buy the Letus with 72mm or 82mm thread size?

Is it better to "step up" or "step down"?

Or maybe it doesn't matter...

The Letus website has no information about field of coverage, but I guess is designed for 1/3 inch sensors and smaller. You should ask them whether it will cover a 0.5" sensor with vignetting.

EDIT: I think there isn't a problem. The camera lens is focused at infinity using a supplementary lens to video an image on ground glass, so provided the ground glass is uniformly bright the primary lens takes care of coverage.

I guess that makes sense. Guess I'll wait for some reports about what actually works in the field.