(meteorobs) Lens question for meteors

[Roman Piffl]

Hi,
here are my tests, you can see differencies between that "fabric" 2.1mm
semi-fish-eye (155° fov) lens and Fujinon fish-eye - about 2 magnitudes...

http://bit.ly/1haawhw

Better lens is better sensitive and faster - on spring we’ve tested 10 fast
lenses (see attachment) and transparency is also important...

On picture:
cameras:
asi zwo 120 mm
watec 902H2U
watec 910 HX
sony effio ve6047osd
kpf130hr
pr blackfly 0.9
dmk 23g445
tayama 4702 modify
tayama 3102

lenses:
computar 8 f1.3 mpx
computar 3.5-10.5 f1.0 1/3"
goyo 3-8 f0.95 1/3"
xtendlan 2.8 f1.0
fujinon 2.9-8 f0.95 DC 1/3"
tamron 3-8 f1.0 1/3"
fujinon 2.9-8 f0.95 1/3"
pentax 16 f1.4
fujinon 1.8 f1.4 2/3"
tokina 3-8.2 f0.98 1/3"

Worst lens is fujinon 2.9-8 f0.95 1/3" - don’t buy it...

Btw, for good sensitivity for low light objects moving detection you also
need as sharp picture as possible. We have about 3.000.000 single video
meteors in our database and after years we’ve tested many cameras with many
lenses...

Roman


2014-06-13 20:39 GMT+02:00 Michael Boschat <andromed at dal.ca>:

>
> Hi:
>
>  I guess better to save the money .. my budget is limited as I've bought a
> few things and the lens mentioned at this
> time  out of my budget.
>
>  I guess I'll stick and try the 2.1mm lens, I can adjust camera from
> 1280x760 to 340x260 (?) and see.
>
> On the nights I have tested the lens, I saw 3 satellites, one flare up and
> 6 planes...but no meteors. As for stars from my
> location here in Halifax, I saw from Mars to Deneb down to Saturn. I have
> an overhang so could not detect stars there.
> My faintest star was Alpha Corona Borealis.
>
>
> many thanks for the replies and help...
>
> Clear skies
> ----------
> Michael Boschat
> Halifax Center - Royal Astronomical Society of Canada
> Astronomy page:  http://www.chebucto.ns.ca/~aa063
> _______________________________________________
> meteorobs mailing list
> meteorobs at meteorobs.org
> http://lists.meteorobs.org/mailman/listinfo/meteorobs
>
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