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  • Photons to Photos - Cloudy Nights
    All Activity Home Forums Astrophotography and Sketching DSLR, Mirrorless General-Purpose Digital Camera DSO Imaging Photons to Photos
  • photonstophotos. net confirmation - Beginning Deep Sky Imaging - Cloudy . . .
    photonstophotos net confirmation By BIGguiX January 27, 2025 in Beginning Deep Sky Imaging
  • Input-referred read noise VS ISO chart - what? - Cloudy Nights
    While looking at data available regarding to this aspect (Input-referred read noise VS ISO), I noticed something somewhat peculiar: the graph shown by photons-to-photos for the Nikon D3400 looks much better better than the one for the D3300 and significantly better than the one for cameras in the D5300 - D5600 range: https: photonstophotos net
  • Nikon Z6III for Astrophotography - Cloudy Nights
    Welp, guess I will be the guinea pig for this one I just got my Nikon Z6III today and my inattention is to mod it and use it solely for astrophotography I am mainly a landscape Milky Way widefield kind of guy, and have used my astro modded Z6 for almost 6 years now I figured it was time for an
  • DSLR Dynamic range and ISO - Cloudy Nights
    The maths behind the dynamic range in the photonstophotos net is DR = Log2 ( saturation read_noise) Example: for the Canon RP the saturation is 4966 and the read noise 3 864 --> DR = Log2 ( 4966 3 864) = 10 3 If I stack 100 photos, the signal in a single pixel will be (or should be) the average of all photos
  • ISO: does going beyond the dual-gain sweet spot make any sense?
    All Activity Home Forums Astrophotography and Sketching DSLR, Mirrorless General-Purpose Digital Camera DSO Imaging ISO: does going beyond the dual-gain sweet spot make any sense?
  • How do I compare DLSR read noise with Astro Cameras?
    Hi, I’m trying to determine the read noise of my DLSRs (Nikon Z7 and Canon 7ti) and compare them to ZWO Astro cameras A typical ZWO spec looks like this: and states it as e-rms, roughly in electrons per pixel Photonstophotos net states DLSR read noise measurements as: it’s stated as log2(DN) Ho
  • Some Canon EOS R Technical Testing - Cloudy Nights
    It can be seen from the PhotonsToPhotos that the Canon EOS R read noise is noticeably higher than the typical Sony sensor at the ISOs most likely to be used for astrophotography i e ISO 800 1600 However, for long exposure RGB imaging the read noise is usually swamped by the noise of the background sky so read noise is not a concern
  • Nikon D7500 and PixInsight. Finding the correct lights ADU.
    Posted December 20, 2020 (edited) I won't have time to download your examples However based on the Nikon D7500 figures at PhotonsToPhotos, here are my approximate calculations for 10*RN^2 at each ISO: Note that the formula 10*RN^2 assumes the read noise is in electrons and it gives a result in electrons which then needs to be converted to ADU
  • Canon EOS R7 or R8? - Cloudy Nights
    Anybody out there doing astrophotography with a Canon EOS R7 or R8? According to PhotonsToPhotos, the R7 has very low noise, and I assume the R8 is similar





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