Subject: Nedinsco 7x50
From: guus kasteel <guus.kasteel@___>
May be there are some readers of the list who have an answer for me. Quite some time ago I picked up a Nedinsco Venlo 7x50 "Nedelta" binocular identical to the one on the picture, only the serial number is earlier. It has a normal type of reticule in the left ocular, with the standard mil-6400 scales horizontal and vertical. However, a few weeks ago, I ran into another Nedinsco Venlo 7x50 "Nedelta" binocular, which has on the left prism house cover a deviating inscription, namely "GRADEN". This translates from the Dutch into "degrees". This inscription refers to the uncommon reticule, obviously in degrees instead of mils. More strange even is that the scale (only horizontal) is only 1.5 degrees to the left and 1.5 degrees to the right, 3 in total. Full and half degrees marks are visible. Anyone any idea what the typical use is for the small-angle degree type of reticule? A more technical question is that the oculars are not in line if justified with the same eye. One is about 1.5 mm higher then the other. Is this the result of mismatching one or more of the lenses between left and right? The collimation seems to be perfect.
Re:cyclops binocular. My late father-in-law brought back such a glass from Asia during his Vietnam service as an USAF Colonel. I don't know where in Asia he bought it, as his duties brought him to Vietnam, Hong Kong, Japan and Taiwan. The glass in question is made by Zeika Opt. Co. and is very odd. It runs on 2 AA batteries and has 2 oculars which are hand focused and marked +2 to -4 (diopters??). The body is covered in black finely textured letherette and is centally hinged. The angle is marked on the left of the axis 70,65,60 degrees. The hinge runs the length of the boday and is 27/8"wide. On top of the right body half are two buttons, the priximal is red and labled 21/2X, the distal green and 8X. The R prism cover (they are flat) says Field 3degrees 35' at 8X, beneath is says 21/2-(actually an approx sign, wavy line)8X 35. The front of the L half has a round screw out disk for the batteries. The single objective is marked on the lens ring Zeika Power Zoom Scope No. 33980. and is fixed to the scope. It does turn like a manually focusing lens with a red dot on the body under the rotating marks infinity to 50 feet in green and meters above in white. However, I can detect no change in image when you rotate it. The zoom is all internal with no rotation of the lens body when moving-you can hear the motor whir. In addition there is a screw on extra objective lens marked Zeika Zoom Scope 4-12X Attachment. There is a soft vinyl fitted case. Using the scope gives excellent resolution and color, very narrow field and it is necessary to adjust the eyepieces to fine focus when zooming in an out. You can focus with the zoom by slightly adusting power. In a microscope I would say it the objectives are not fully parfocal. It is cool looking piece. Clearly of very high quality (execpt for the fine focus with zoom-but that is usual in zoom scopes and this seems less than in some zoom binocs I've played with.) I have no idea what the rotation of the ocular by had accompishes. It has the Passed oval stickerof the Japan telescopes Institute. He served in Vietnam around 1973-74. I hope this is helpful.
Oh, about the 7x50 wide angle-what about the Kronus 7x35 WA (I know, Arnie and his Russian stuff again)Compact, 11 degree field of view, max resolution 6", excellent color rendition(no yellow),about 15 feet near focus and about 100USD. For my 53 yo eyes the 5mm exit pupil is probably all I can use anyway.
Take care, Arnie
From: " Jack Kelly" <jkelly@___mentsales.com>