My setup here at post 53 http://www.birdforum.net/showthread.php?t=194800&page=3.
Your scope would falls under the digiscoping section I belief. But I think we are very close technically.
I tried my Skywatcher 80 ED with old 2x TC Komura Telemore 95 7 KMC ( M42 thread) that gives focal length 1200 mm and 2400 mm equivalent.
Setup suffers from lack of contrast and magenta cast (old coatings of TC ), but chromatic aberration is well controlled. Tried to shot birds in flight ( large, slowly flying raptors and storks), but focusing without chip is extremaly difficult. Angle of view (1 degree) is just a bit wider than size of the Moon.
Telescope mounted on Velbon Sherpa 600 tripod and cheap gimbal head.
ISO 200, 1/200 s pushed in PP +0,8 EV, sharpened and denoised in Neat Image
1:1 crop attached.
Distance exactly 15 m.
Hi Adrien, Welcome to Birdforum! Very nice pictures using a fast achromat!:t:
Hello.
This is my first message in this section, and those are my first photographs shown. It's not as good as those seen here before..
All the pictures were taken with a Skywatcher ST102 refractor (500mm f5).
The pigeon was taken at 1000mm with a kenko converter, at 6400 ISO at the very end of the day.
The blackbird was taken at 500mm, it's a heavy crop.
Thank you
My experiments with Barlow lens
E-520 + Skywatcher 80 ED with Barlow GSO 2x (baffled) mounted in extension tube-magnification approx. 1,7x, ISO400, 1/800 s.Setup on tripod with gimbal head. Day was hot and atmospheric distortion is visible. First photo of Marsh Harrier is 80% of frame, second 60%.Bird was gliding slowly so I was able to focus using very dark viewfinder.
Third photo -White Tailed Eagle is from distance circa 500 m, 1100x 850 pixels resized to 800x 600.
That was excellent considering your using Achro and new to this setup. Few here can achieve that during out initial trail of this system.
Your 2X Barlow when mounted in extension tube only give 1.7X ? That's handy. Your Oly at that ISO and setup does comes out well.
My GSO 2X would give me 1.5X when mounted inside the 2" scope adapter. The closer you can get the barlow to the camera then the lower the magnigication.
Paul.
Thank you! |;|
There is not enough details in those pictures. I still think an ED80 is a better choise, (but I have no money).