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Astrophotography Basics: Does Exposure Time Matter?

Marks Astro Journey 2,659 1 month ago
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In this video, I discuss why an amateur astrophotographer should better understand Exposure Time and Signal To Noise Ratio to improve the quality of their astrophotography images.. Enjoy! Here's some equipment I'm using for my setup: Blütezeit Automatic Sliding Gate Opener 2700LB Rack Driven 3/4HP https://amzn.to/3Ur1mpJ Sky-Watcher EQ6-R Pro Telescope Mount: https://agenaastro.com/catalog/product/view/id/7523/s/sky-watcher-eq6-r-pro-computerized-goto-telescope-mount-s30300/?gad_source=1&gbraid=0AAAAAD_aP9LP_IOzky9xBW9v1kqZqoMHB&gclid=EAIaIQobChMIqanznc2shwMV1En_AR1ongIuEAQYAiABEgK2_vD_BwE Note: I am an amazon affiliate. If you follow any of the amazon links and make a purchase, it helps support my channel. Optolong 2" Filter Set of 7 - LRGB, H-Alpha, OxygenIII & SulpherII https://www.highpointscientific.com/optolong-2-filter-set-with-lrgb-h-alpha-sii-and-oiii-filters-lrgb-hasiioiii-200 ZWO 7-Position Electronic Filter Wheel for 2" or 50.4mm Filters https://amzn.to/3NHJCmt ZWO EAF Electronic Automatic Focuser - Advanced (New 5V Version) https://amzn.to/48K6Osz William Optics RedCat 61 WIFD f/4.9 Petzval Refractor Telescope https://amzn.to/48bDmeI Sky-Watcher EvoStar 100 APO Doublet Refractor Telescope https://amzn.to/3PWW0gN ZWO ASI2600MM-Pro 26 Megapixel USB3.0 Cooled Monochrome Astronomy Camera for Astrophotography https://amzn.to/485zxI7 ZWO ASI183MC 20 Megapixel USB3.0 Color Astronomy Camera for Astrophotography https://amzn.to/3CDJVtH iOptron GEM28 Mount - Head with iPolar in Hard Case https://amzn.to/3PR7WAJ ZWO M48 to M48 Extender / Spacer Ring with 16.5mm Extension # ZWO-M48-EXT16.5 (used to obtain precise back focus with field flattener) https://agenaastro.com/catalogsearch/result/?q=ZWO%20M48%20to%20M48%20Extender%20%2F%20Spacer%20Ring%20with%2016.5mm%20Extension%20%23%20ZWO-M48-EXT16.5 ZWO Filter Drawer with M42 & M48 Threads - For 2" Mounted Filters # FD-M42 https://agenaastro.com/zwo-filter-drawer-with-m42-m48-threads-for-2-filters-fd-m42.html 2" Baader Neodymium Moon & Skyglow Filter with IR Cut https://amzn.to/3sI9BiH Optolong 2" L-Enhance Dual Narrowband Light Pollution Filter (H-Alpha and H-Beta/O-III) https://amzn.to/3fnuCfB This eyepiece is awesome for visual astronomy with its wide field of view. Alpine Astronomical Baader 76° Morpheus 17.5mm Eyepiece (1.25"/2") https://www.bhphotovideo.com/c/product/1405414-REG/alpine_astronomical_morph_17_baader_morpheus_76_17_5mm.html This is a very well made barlow lens I've been using for visual astronomy. I found thought that this doesn't seem very compatible for astrophotography for my setup unless using the diagonal (only way to get camera focus). Celestron 93436 Luminous 2-Inch 2.5x Barlow Lens (Silver) https://amzn.to/3KsfloY This is a must have for astrophotography purposes. Sky-Watcher S20201 Reducer / Corrector https://www.bhphotovideo.com/c/product/759379-REG/Sky_Watcher_S20201_S20201_Reducer_Corrector.html Astromania M48X0.75 (2" Filter) Female to M42X0.75 T / T2 Male Thread Telescope Adapter (to achieve back focus with reducer/corrector) https://amzn.to/3KueNid Alstar Astronomical 2"/M48-extension Tube Kit for Cameras and eyepieces - Length 5mm 8mm 10mm 20mm 30mm - M48x0.75 on Both Sides (adapter to use with tubes for achieving back focus with reducer/corrector) https://amzn.to/3ReIyps SVBONY Bahtinov Mask, Aluminum Alloy Bahtinov Focusing Mask, 85-120mm Caliber Fixed Diameter 80-135mm https://amzn.to/3RkVp9A I find this lightweight cart handy for hauling in/out a stack of organizer boxes and the mount case. Leeyoung Folding Hand Truck and Dolly,309 lb Capacity Aluminum Portable Cart with Telescoping Handle and PP+EVA Wheels https://amzn.to/3KwAFcJ Some gear for cleaning purposes: UES Air Blower Dust Blaster for Digital, DSLR, SLR Cameras Sensor Lens Cleaning, Rubber Bulb Air Pump Dust Blower Cleaner - Black https://amzn.to/3e4qUXc UES APSC-16 DSLR and Mirrorless Digital Camera Sensor Cleaning Kits for APS-C Type CMOS and CCD Sensors (14pcs APS C Sensor Cleaning Swabs and 15ml Sensor Cleaner) https://amzn.to/3cw0NYW UES Lint Free Microfiber Cleaning Cloth for Lens, Eye Glasses, LED (8 Packs - 15cm x 15cm) https://amzn.to/3Av4eHa These are great for making sure you don't have any dust or dirty spots on your CMOS of your camera. Beileshi Watch Repair Magnifier Loupe Jeweler Magnifying Glasses Tool Set with LED Light with 8 Interchangeable Lens-2.5X 4X 6X 8X 10x 15x 20x 25x https://amzn.to/3Kwx26J If you have to transfer images/files from your laptop to another computer for further processing, this external drive is very fast compared to something like a thumb drive. SAMSUNG T7 1TB, Portable SSD, up to 1050MB/s, USB 3.2 Gen2, External Solid State Drive (MU-PC1T0H/AM), Blue https://amzn.to/3PZ9o41

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