Archiv rubriky: Pokusy

QSI vs. ATIK Sony ICX master bias example

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)

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

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Deconvolution Example

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

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Newtonian Secondary Holder (Spider Vanes) Issue

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

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ASA 3“ Wynne 0.95x Corrector – a Quick Test

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

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

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

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

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

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Set-Point TEC Cooling Tests of QHY CCD camera

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

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Dew Heater Straps Measurement

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

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What’s the problem with my flat field? Dew or Icing.

From time to time, I see this question to be posted on various discussion boards and forums. As I have recently got a new experience, I show an example of a flat-field calibration frame affected by dew (or possibly icing) … Celý příspěvek

Rubriky: Articles in ENGLISH, Pokusy | Napsat komentář