I Was Wrong About f/2. Big Time. Hyperstar Fail ( C8 Edge vs Z61 II ) | F/2 vs F/5.9 #space

I wanted to go fast. I put my Celestron C8 Edge HD + HyperStar (f/2) up against my William Optics Z61 II (≈f/5.9) on the Veil. Same camera, same filter, same night. On paper, f/2 should crush it. In practice… my first result said the opposite. 😬 So I dug in. One seemingly small calibration step nearly wrecked the whole experiment—and fixing it flipped the outcome. This episode is the full story: the physics, the setup, the misstep, and the data that finally made sense. Test setup C8 Edge HD + HyperStar v4 (≈400 mm, f/2) https://amzn.to/42RyRFR William Optics Z61 II (360 mm, f/5.9) Camera: SVBONY SV605CC (533-class) https://amzn.to/4hnsOi9 Filter: SV220 dual-band 7nm https://amzn.to/4hpEAbX What’s inside f-ratio in 90 seconds (time ∝ f², what that really means for SNR/hour) HyperStar history & how it turns a C8 into a ~400 mm f/2 “time machine” The “before” result that misled me (and why) The one calibration fix that changed everything Side-by-side results, measured on linear stacks, normalized to SNR/hour Final images + an honest verdict: speed, sanity, and when each wins Guiding: 0.5 s, dither every 3 • Integrations: HS 132×60s, Z61 22×300s Measurement: linear stacks, same ROIs, compared as SNR/hour If this kind of real-sky mythbusting helps, subscribe for more experiments—and if you want to fuel the next test, buymeacoffee.com/deepskylab. Clear skies. 🌙 #HyperStar #Astrophotography #CelestronC8 #WilliamOptics #DualBand #SVBONY #f2 #DeepSkyLab #IWantToGoFast