No.32 MkI

[CINDERS]

For those interested on usedguns.com.au about the going rate without bracket, I thought the parallax would be set at infinity instead of a 100M. Is this correct for the scope.

Calibre/Item: Scope
Make: Tel Sighting
Model: No.32 , Mk I
Condition: Good
Price: $2295
Advertised: 7/01/2017
Licence number:
Phone:
Comment: Recently fully serviced by Optical Restorers. Parallax set at 100mtrs. Scope centred, externally left in its original condition. Other markings 1942, No:1962, OS466A ^
Transfering dealer: Lakeside Sporting Goods Vic
State: VIC

Information

Warning: This is a relatively older thread This discussion is older than 360 days. Some information contained in it may no longer be current.

[henry r]

The more of these i see advertised the luckier i feel to have found one in my budget.

[Peter Laidler]

On to Cinders very interesting comment and the answer is this. Because it is a SIGHTING telescope with a graticle or graticule (if it's a glass etched plate then it's a reticle incidentally) then the ocular or eye end of the telescope is focussed using what is known as PE - or perfect eyesight - onto the tip of the graticle by using an intermediate lens....., yep, that's it....., the erector cell that serves two purposes. Let me digress here. This is because when you're using a sighting telescope the tip of the graticle is the most important part of the whole ocular end. After all, your target is on the tip of it! Anyway, the tip of the grat is absolutely collimated with the mechanical axis of the telescope, that's why we rotate it in vee blocks.

Right......... The tip of the grat is perfectly focussed NOW is the time to bring the image into focus. Don't forget now that what you are looking at is NOT the real thing but an optical image. This part of the focussing must be done by something other than the ocular lenses and the erector lenses. So it's down to the objective lens or simply the OG. This is adjusted to bring the focal point of the image onto the focal point of the grat EXACTLY. When it is EXACTLY right for PE, you should be able to move the eye across/up/down the centre third of the ocular lens (going to get complicated if I elaborate now so I won't.....) and the tip of the grat will remain EXACTLY on and EXACTLY focussed on the target/image. The image is described as a distant aiming point or DAP. WHEN VIEWED NEUTRALLY. That is in perfect conditions. Not through fog or mist or worse still, through a window - which is just another bloody lens!

Nearly there....... So you can understand now that setting up the telescope is like setting up a No4 bolt. Lots of things must all come together for it to be perfect. One bad lens or duff setting will put the whole lot out. So Cinders is right. 100 yards is not a DAP but a pylon at 1,000 yards is perfect

[Roger Payne]

A lot of things just fell into place, reading your last post!

[CINDERS]

Thank you for your explanation Peter it is well appreciated, we set our paralax at every range (F class) with the old head bobble if the reticle moves its not focused correctly only when it stops do you start putting lead down range as you know the focus is perfect. Hopefully it may be a typo and they left a zero off the 100mtrs!

[read6737]

very interesting info Peter,
something strange though
I could understand it. LOL.

[mrclark303]

Fascinating stuff Peter, just when I thought I had a reasonable layman's grasp of optics ... its quite apparent I don't have the first bloody clue! Please keep the lessons coming..