The William Optics Zenithstar 61 II APO features an air-spaced doublet lens with fully multi-coated optics and an Ohara FPL-53 ED glass element for sharp, high contrast images virtually free of false-colour.
Provides high resolution images when used for astrophotography or wildlife photography and is a convenient ultra-portable telescope for visual astronomy (think binocular astronomy targets).
The fast f/5.9 focal ratio and compact size make it ideal for convenient wide field astrophotography or piggybacking.
Dual speed 2" 1:10 R&P focuser.
Available in Red, Gold or Space Grey anodised.
The dispersion properties of ED and SD glass elements are important in determining the overall colour correction. The abbe index is used to quantify the 'partial dispersion' of a particular glass. Pure Fluorite offers the highest partial dispersion at around 94.99 V, Ohara FPL-53 glass is very close to Fluorite at 94.93 V and is often referred to as Synthetic Fluorite. FPL-53 is also noticeably better than Ohara's lower spec' FPL-51 glass which offers an abbe index of 81.54 V.
|Average Rating (8 Reviews): |
Thursday, 17 June 2021 | William
Amazing quality, and an awesome scope. ,really all the reviews that have gone before me say it all .
William Optics you have done it again.
Saturday, 5 June 2021 | James
This is a very useable quality scope. I only bought it to pass the time until my SCT order from February arrives. Itís my first owned scope so I canít compare to others but all the William Optics gear I bought is high quality stuff.
Seemingly indestructible, ultra portable telescope, with excellent image quality
Tuesday, 13 April 2021 | Roland
I bought this as a portable field scope and as a guide scope for my 8" EdgeHD, along with the 61ii flattener. The build quality is excellent. Within the first few weeks of purchasing this scope I managed to drop it 1 metre onto gravel after failing to secure it properly to the main OTA. This was quite traumatic to watch. Astonishingly the scope was 99.9% unscathed (just a minor scuff on the cap) - optics appear fine - in fact I have recently used this for wide field imaging and I'm extremely impressed with the results. Awesome product!
Thursday, 8 April 2021 | Michael
This item was promptly delivered by First Light Optics and, straight out of the box, it is obvious that this is made to the highest of standards. It feels really solid and well constructed from high quality materials. William Optics have carefully considered the needs of photographers in the design, and the focussing system is a treat to use. I can not recommend this too highly and look forward to great results from it whenever clear skies permit.
William Optics Zenithstar 61 Apo
Monday, 22 March 2021 | Michael
I bought this little scope,as i intend to set up a dual imaging rig,and i wanted a scope that would,nt be adding too much more weight onto the mount.Being William optics i expected quality,and thats exactly what i got. the scope is a thing of beauty and very well made.A big must for me is that it has a rack and pinion focuser,as i did,nt want any slippage when at the Zenith.The two speed focuser is exerllent and holds its position very well indeed with weighty cameras.
Overall this little scope punches well above its weight both optically and mechanically,and i would heartedly recommend to anyone who is looking for a scope like this.
Friday, 12 February 2021 | Sean
Fantastic quality scope using with flattener really impressed and great service from FLO
Wednesday, 20 January 2021 | Andrew
I was absolutely delighted with the ZS61 when it arrived. Everything about it just oozes quality. The focus wheels feel lovely and smooth, and allow for both coarse and fine adjustment. The built in Bhatinov mask is a lovely touch. I have yet to point it at the stars (thanks clouds), but have given it a brief daylight test. Focussing way across the fields to some distant trees, in the grimmest of weather, it was able to pick out some very fine detail amongst the branches and twigs. I am very happy with the purchase, and am rapidly becoming a Williams Optics convert.
Thursday, 5 November 2020 | Patrick
Super livraison comme d habitude...merci Flo et a bientŰt.