Archiv rubriky: Pokusy

Proč nemám čas?

Publikováno 27/03/2019 | Autor: pavelpech

Proč nemám čas? Protože když ho chvilku mám, neumím si ho zorganizovat produktivně a pak, taky, neumím říct ne. Chtěl jsem léta napsat článek o tom, jak těžké je to být astrofotič, ale být rodič a mít dítě je úplně … Celý příspěvek →

Rubriky: Pokusy | Napsat komentář

QSI vs. ATIK Sony ICX master bias example

Publikováno 19/11/2014 | Autor: pavelpech

This is just a quick and actual/current (19th November 2014) comparison of a master bias from a QSI 660 mono camera versus Atik 460 EXM camera. Both cameras feature famous/great Sony ICX694 CCD detector known for its low noise and … Celý příspěvek →

Rubriky: Articles in ENGLISH, Pokusy, Technika, recenze | 1 komentář

Flat Calibration Example (Kodak CCD)

Publikováno 09/06/2014 | Autor: pavelpech

This is just a quick-look example to show how important it is to perfectly well calibrate your flat fields with either master bias (for really short flat field subs taken with interline readout Kodak chips and cameras with electronical shutter … Celý příspěvek →

Rubriky: Articles in ENGLISH, Pokusy | Napsat komentář

Deconvolution Example

Publikováno 15/03/2014 | Autor: pavelpech

Finally, after years of imaging with short focal length telescopes which resulted in so called undersampled data (image scale of 3″, 4″ or 5 arcseconds and more) I have collected some oversampled data now with my newest setup (image scale … Celý příspěvek →

Rubriky: Articles in ENGLISH, Pokusy | Napsat komentář

Newtonian Secondary Holder (Spider Vanes) Issue

Publikováno 21/12/2013 | Autor: pavelpech

Newtonian astrograph is probably the best choice for those of us who are seeking ultimate performance. But, there are plenty of really key (fundamental) things that must be built with highest precission and quality possible. One of them is the … Celý příspěvek →

Rubriky: Articles in ENGLISH, Pokusy, Technika, recenze | Napsat komentář

ASA 3“ Wynne 0.95x Corrector – a Quick Test

Publikováno 30/11/2013 | Autor: pavelpech

Although vast majority of equipment (especially for photographers) that’s today on the market does have plenty of issues or design flaws (I am reasonably critical to almost everything) sometimes it really happens – a miracle. There’s something just perfect, great, … Celý příspěvek →

Rubriky: Articles in ENGLISH, Pokusy | Napsat komentář

ASA 3“ Wynne + Moravian G3-11000 CCD at F/3.6

Publikováno 30/11/2013 | Autor: pavelpech

I am most probably the first person who has this combo and who discovered a design flaw in G3 series of Moravian cameras. This concerns only full frame (36x24mm) sized chip when it is used with very fast optics (e.g. … Celý příspěvek →

Rubriky: Articles in ENGLISH, Pokusy | Napsat komentář

Noise Tests of Kodak KAI-11002ME in Moravian G3-11000 CCD

Publikováno 26/02/2012 | Autor: pavelpech

Initially, I wanted to measure dark current of KAI-11002ME, because everybody says how high it is (yes, from the CCD specification it’s really huge), but has anyone really “seen it”? Me not. I have seen – measured – couple of … Celý příspěvek →

Rubriky: Articles in ENGLISH, Pokusy, Technika, recenze | Napsat komentář

Set-Point TEC Cooling Tests of QHY CCD camera

Publikováno 10/12/2011 | Autor: pavelpech

There were many reasons to purchase a color CCD camera after having more than four monochromatic cameras dedicated for astrophotography. Some of them were: shooting comets, shooting constellations, shooting broadband color images (reflection or dark nebulae) under limited weather conditions … Celý příspěvek →

Rubriky: Articles in ENGLISH, Pokusy, Technika, recenze | Napsat komentář

Dew Heater Straps Measurement

Publikováno 29/08/2011 | Autor: pavelpech

I have collected many objectives (OTAs – optical tube assemblies) during the last three years I have been doing astronomical photography and since I decided to have a heating strap for every single lens I use (so as I do … Celý příspěvek →

Rubriky: Articles in ENGLISH, Pokusy | Napsat komentář