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Storing on camera no faster than PC?



Normally storage speed is not an issue with astrophotography's long exposures.  But I want to do some shorter exposures of the eclipse.  I get about 10 frames/minute over USB (2.0) with a Nikon D750 whether saving to camera or to PC.  Even when the buffer is full, the D750 will take 2-4 frames/second on its own. 


Why the slowdown?  Can anything be done?  Any other alternative programs for heavy bracketing?

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My only suggestion is to be sure that you have the fastest memory card that you can purchase. With my T5i I am using a Samsumg EVO Plus 100Mb/s card. I get about 15 frames/minute with BYE when saving only to the memory card. The fact that, for you, saving only to the memory card is not faster suggests that your card is slow.

I will also say that BYN communicates with the camera via Nikon-provided software (SDK) and there may be nothing that Guylain can do to improve the performance of BYN if the bottleneck is in the SDK.


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I'm using a 90MB/s write speed card.  

15f/m is still pretty slow - I'm guessing its slower than the T5i takes standalone.  Not sure why you're significantly faster - both are USB 2 cameras.

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Although BYE/BYN will work for the eclipse it is not designed for eclipse imaging.  Using it will have some limitation is terms of how many images one can take per minute... even saving to card only will most likely not be enough,

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One reason why my T5i is faster than your D750 is the sensor size. The D750 has 33% more pixels than the T5i, so 24 MP as compared to 18 MP. Those extra pixels take extra time to process at each step along the way.

I agree that the cycle rate is slow as compared to standalone, for both Canon & Nikon. As you said, BYE and BYN were designed for deep sky astrophotography where long exposures are the norm. I am not surprised that there is a processing delay of several seconds between images.

One of the reasons that I was attracted to BYE was the user experience that comes from the design that has been implemented by Guylain and Chris. The rich user interface is not without some penalty in terms of contributing to the cycle rate. The features which have been requested by users over the years have also taken a toll. If you go to Home Depot and look at hammers, how many different types will you see? A sledge hammer and a rubber mallet are both used to strike things, but for different applications. Just as BYE/BYN may have some drawbacks when used for rapid fire imaging of an eclipse totality, so Eclipse Orchestrator would fall down when used for long duration deep sky astrophotography. My Dad used to say choose the right tool for the job!

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