D300 lens accessorie

Discussion about Multi Purpose Night Vision Systems

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D300 lens accessorie

Postby cervantes » Wed Jun 29, 2011 8:30 am

hi all i have any questions for d300 lens accessorie.

3x magnification it is adjustable to 1x when I turn the adjustment ring?

or i need remove lens of device for return to 1x magnification?

Sincerely cervantes.
cervantes
 
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Re: D300 lens accessorie

Postby rusty » Wed Jun 29, 2011 2:48 pm

I can only comment on my D300.. The 1 x lens has to be removed to install the 3 x and then that removed to go back to the 1 x. I think they are all like this unless someone has made an adapter to fit a C mount lens.
Which now that I think about it would be a good modification for the D300.

cheers
Ian
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Re: D300 lens accessorie

Postby efahrenholz » Wed Jun 29, 2011 3:56 pm

If it's a standard c-mount lens then you will have to unscrew your 25mm (1x) and screw in the 75mm(3x) lens. I'm not sure what you mean about twisting the ring to get 1x. I can only imagine you are twisting a focus ring. If it's not a tv/cinema lens (markings and numbers all over it) it won't have an aperture ring.
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Re: D300 lens accessorie

Postby cervantes » Thu Jun 30, 2011 9:24 am

ok i see thx for your fast answers :)

yes efahrenholz i think an adjustment ring for zoom or zoom out is a good idea accessories for a d300.


http://www.youtube.com/watch?v=V2vM3a2c ... re=related

we see on this movie a zoom with camera, its a realy good option for move in total darknes and be able to see far ahead to better move in the least favorable conditions for the use a night vision device.


This will correct the defect of this type of device, over-lighting when use an IR torch.


I wear glasses so I have a loss of image sharpness when I use a d300 and IR torche over-lighting.

So I see near but not far a zoom and zoom out its perfect solution for correct this defect generated by over-lighting.


but I'm afraid this kind of idea do not be feasible :'(

cervantes.
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Re: D300 lens accessorie

Postby efahrenholz » Thu Jun 30, 2011 10:13 am

While a zooming option would be neat, it's not reasonable on a c-mount. They exsist but they are pricey and fairly heavy for a c-mount application. Lightweight lenses are going to be too slow. You can't skip on the size of lens elements to save on weight--you end up with a dark lens.
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Re: D300 lens accessorie

Postby cervantes » Fri Jul 01, 2011 10:19 am

At first I thought the lens functioned as such.

The D300 can be set thanks to an accessory behind a rifle scope or camcorder.

I think an accessory for attachment to a single monocular standart should not be a problem of design in size and weight.


everything is in the magnification it is best to zoom in and out.

1x to 3x magnification or other to move and can be zoomed to its anticipated movement in the total darkness.
without having to change the lens in order to achieve this.

cervantes
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