Very interesting design. With the red dot side mounted are you able to overcome the parallax problem at all? If so, what happens when you shift from 75 yards to 400 yards focus? Do you need to readjust every time there is a large distance differential?
Yes, that is very interesting!!!Hi Jerry,
You might have a slight parallax problem with obstacles very close in front of the scope ... for example, I can sight through my window over my balcony rail with the reflex sight, but then find the rail blocks the view through the scope.
However, that doesn't depend on sight orientation and is a non-issue at practical observation ranges, so I think that's probably not what you meant.
The red dot sight can be adjusted in azimuth and elevation to have its sight line parallel to the optical axis of the scope, regardless of which side is up.
If you do that, the sight will point to a spot about 10 cm to the right and 5 cm above the scope's sight line, which at practical observation distances is right in the middle of the field of view.
(The field of view is about <edit:>20.7 ft at 300 yards, fully zoomed in ... an offset of 4 1/2 inches would be hard to notice, I believe.)
My background includes rifle sighting so I’ve been more oriented toward getting the dot to the center of the view rather than parallel to the center of the view (optical axis).
Here is a quick photo. Equipment is basically a mashup of video rig hardware. A cheese bar between two handles with sight mounted on plate. Plate (sight) moves left-right, up-down on the cheese bar. It can also be reversed to set the sight further from the eyepiece if that’s desirable.All mounted on ballhead with quick release for both just the scope and also the entire rig.
Thanks a lot for sharing your solution! Great use of multi-purpose components, and looks really sturdy, which I'm sure helps to keep the sight well-aligned!
Looks like the central piece is a dovetail plate with a screw-on clamp, which takes a dovetail-to-dovetail adapter, on which you have mounted the same 11-mm-dovetail sight I am using?
The video people use NATO rails for mounting some accessories and handles. NATO rail is basically a refined picatinny or Weaver rail so most reflex sights fit natively to NATO rail without an adapter.
Therefore, on my mount, there is the accessory plate that slides on the rod. Screwed to the plate is 70mm NATO rail. The sight mounts directly to the rail without adapters or dovetails.
In relation to your sight mount (which I think is terrific as is), have you considered the possibility of a simple platform with several 1/4 inch mounting holes? With that configuration the purchaser could bolt on whatever mount suits them - rail, dovetail shoe, or cold shoe (for something like the Olympus EE-1).
With regard to screws versus different variants, single-piece mountings are obviously simpler and more sturdy, but screws might make a mounting configurable even if you stay with the same type of rail, so that idea certainly makes sense!
I'm not sure how practical this would be, or even which material would be most suitable but the thought of a "snap on" sight mount is quite appealing.
What I had in mind is rather similar to your design (but with one eye on simplicity, cost and ease of manufacture) I was thinking of replacing the machined "cage" which goes around the eyepiece with a reusable cable tie.
The kind of design I'm thinking of which is pretty much exactly as you just described would be suitable for eyepieces like the Nikon 38x wide fixed mag which I use on my scope or anything similar.
The base part could be cable tied around the eyepiece and then the sight mount just clipped on or quick released as necessary.
Very nice work Henning - if they were available I'd buy one - I've always been curious about the red dot sights and with such a small, discreet block attached to the scope it would be easy to leave it in place whilst transporting it and simple to quickly attach the sight when needed.