標題: Update in 2010 onwards 27 [打印本頁] 作者: ybaiogsc 時間: 2016-4-1 03:23 標題: Update in 2010 onwards 27
Afocal Astrophotography
Update for 2008 onwards: I now have a 4 in . F6.5 Generic Priligy Uk Celestron Nexstar on a GOTO t az mount it works just as well for afocal imaging as the Seven.5 inch better on big objects in fact.
Update in 2010 onwards: well, I ultimately went down the DSLR path and started prime focus image. I did seriously consider a new Delaware but it is now very difficult (extremely difficult in fact) to find one which has a threaded lens.
Anyway, for what its worth, here is how I used to practice it .
Pros and Cons of Point camcorders cf DSLRs
You will often see it stated that DSLRs are better because
their own CCDs have larger pixels which often can hold many more photons and hence Cialis Online Australia lessen
the random noise. With regard to everyday photography this is true even so the
reason this works is that DSLRs have much bigger contact apertures and so
collect much more lumination for a given exposure and F number. In astronomy,
the level of light is fixed by the telescope not the camera lens,
so this edge vanishes (except see under!). my 2020Z has a 6mm Kamagra Oral Jelly focal
time-span at f2 => 3mm aperture. A low power eyepiece intended for optical viewing
may have, say, a 6mm exit pupil, well, Priligy Generic i am effectively limiting my
telescope to one of half your aperture. Zooming in, either using the
camera Cialis Online Australia or the eyepiece, helps (supplies a larger camera aperture or
smaller sized exit pupil) but, certainly, reduces the field of scene on theHow To Image DSOs The basic thought is to take lots of limited
