Gun Sight on Lens

[Pistnbroke]

It was recently suggested to me that fitting a gunsight to my 200-500 would help in bird acquisition /BIF
I fitted this one to the tripod mount reversed to the top.

https://www.ebay.co.uk/itm/Tactical-Red-Green-Dot-Sight-Scope-W-20mm-Weaver-Rail-Mount-For-Pistol-Gun/192425917405?_trkparms=aid%3D111001%26algo%3DREC.SEED%26ao%3D1%26asc%3D20160727114228%26meid%3D6017422a80ee4f60812b687705dab5c8%26pid%3D100290%26rk%3D3%26rkt%3D4%26sd%3D192537124986%26itm%3D192425917405&_trksid=p2060778.c100290.m3507

It seems to work well either by using the sight and then moving to the viewfinder or sighting  the BIF  and then blasting away in AF-C.

Have others had success or failure with this or any tips on best use.

[Seapy]

http://nikongear.net/revival/index.php/topic,7555.msg122483.html#msg122483

Amazing!

A good friend on another forum raised the exact same idea with me this morning: D500 with 300PF + 1.4.

[chambeshi]

for the the new P1000 but also suitable for a telephoto on DSLR...

http://nikongear.net/revival/index.php/topic,7761.msg125953.html#msg125953

[Hugh_3170]

Olympus sell a similar sight as an accessory for their 300mm M43 tele lens.

[Pistnbroke]

Don't go crazy on the cost ...mine cost £20  and is waterproof to 20ft which the Nikon one is not

[RoyC]

For your long glass that has a lens hood with a screw lock, just align the screw with the hot shoe and do a little practice aiming at ree top and then looking through the view finder to see how high to your eye needs to be above the hot shoe for the camera to be lined up on the target. Do a little practice and when you look through the viewfinder your subject will always be in sight. Zero cost.

[MILLIREHM]

I would find this distractive
better concentrate on camera/lens combo and learn getting a feeling with it where to target
but interesting nevertheless

[Roland Vink]

Surely with the 200-500 zoom, it would be easier to start at 200mm to locate the subject within the viewfinder, then zoom in to frame and compose.

A separate finder could be useful for long telephoto primes, I can imagine with such a small angle of view, it would be difficult to frame the subject in the viewfinder. On the Nikon 2000/11 reflex, a small sight was built into the handle, but they didn't provide this feature with other long lenses.

[MILLIREHM]

Surely with the 200-500 zoom, it would be easier to start at 200mm to locate the subject within the viewfinder, then zoom in to frame and compose.

A separate finder could be useful for long telephoto primes, I can imagine with such a small angle of view, it would be difficult to frame the subject in the viewfinder. On the Nikon 2000/11 reflex, a small sight was built into the handle, but they didn't provide this feature with other long lenses.

I have worked with 500, 600 and 800 mm primes, it becomes more difficult but can be trained, a proper support can be helpful.
I expect the 2000 reflex to be targeted more difficult but have no experience (only with the 500 mm Reflex Nikkor)