Brille
I see that, and I understand your concern, but this is a situation where we analyzed the cause, and it's not a device issue, but a natural phenomenon.
We are now constantly improving Seestar, because the demand of users is increasing, so we are planning to pull the traditional astrophotography needs to add features to Seestar, so that Seestar is not only a telescope for astronomers, but also to move towards more professional astrophotography.

  • jon likes this.

    Brille
    Professional astronomical photography needs dark field, flat field and offset field.
    If the user does stretching processing, it is necessary to use post-processing techniques at this time need to use the flat field, we will develop the flat field calibration function as soon as possible.
    seestar has initially developed advanced features, such as the current equatorial mode.
    If customers use these more specialized astronomical photography functions, they will need to match the specialized astronomical post-processing technology.

      [unknown]

      Thank you !

      I am not sure 60 sec is more important than giving your city center and suburb users with many man made obstructions, access to eq mode at 10/20/30 Sec. You are giving a tiny marginal gain to those who already can use eq mode, because of increased rejection rate at 60 sec, and leaving many others frustrated without eq mode.

      I think one should have the choice to point any region of visible sky to do polar alignement, just as I have to do for horizontal calibration from my same balcony. It should be like the 3 points polar alignement in NINA or dwarf3.

      …very disappointing…

      Thank you,
      Stevan

        jon
        The purpose of increasing the exposure time is to improve the signal-to-noise ratio, reduce noise, optimize the performance of the EQ mode, and reduce the number of stacked frames to improve processing efficiency.
        This plan was made when the EQ mode was launched. Regarding the polar alignment problem, we rely on the zenith to design it. For the time being, we can only recommend using the theodolite mode on the balcony.

            裕 沼尻
            In equatorial mount mode, when the composition is not rotated, the FOV rotates with the target, which is the function of the equatorial mount to eliminate field rotation. What do you mean by the offset angle? Do you mean that in equatorial mount mode, when making a plan, after adding a target, the red frame will rotate, right?

              Very disappointed with the new EQ mode, lots if dropped frames and star streaks even after spending a long time setting my S30 up. I have a 2m square concrete Base that is perfect flat and level, but still did not manage to get more than a few frame before star streak started to appear and then repeated star streaks every few frames, not good.



                jon
                Just got a reply, it may be changed later, the user may not have to calibrate in only one orientation.

                    Support@Seestar

                    Oh, that’s wonderful !

                    Thank you so much for having asked further your team, very kind and professional.

                    Best Regards,
                    Stevan

                      Support@Seestar This is a common error in understanding the role of sub-exposure time vs total stacked time when stacking multiple frames.

                      For a single exposure which will not be stacked with additional exposures, a longer exposure absolutely increases SNR compared to a shorter exposure.

                      However, when stacking images, either live or in post processing, using longer exposures for the sub-frames does not necessarily improve SNR compared to stacking shorter exposure frames so long as the total stacked time is the same. For instance, stacking 60 x 10sec exposures for a total of 600sec will result in the same SNR as stacking 20 x 30sec exposures with the same total of 600sec in the final image so long as the read noise is the minor source of noise in the images. And with today's extremely low read noise cameras such as the one inside the Seestar this is likely the case, especially if the gain is set low. Light pollution shot noise is likely the dominant source of noise for many, if not most users, this is the case. Dark current shot noise will likely be the dominant source of noise for anyone working at a dark site, not read noise since the Seestar uses an uncooled sensor.

                      When doing post processing of the collected images longer exposures does have the decided advantage of having fewer frames to run through the post processing software which can greatly speed up the processing time.

                          frederic_begin When the arm opens, try to rotate the base of Seestar (not the mount that must point north) until the arm points a clear part of sky and then start the alignment .... It could work (taken from another thread)

                          • jon replied to this.

                              Is the option not to do live stacking (the Live "switch" under Advanced Features) still there in v2.4? To me is very important. Thanks.

                                curtismacc And fewer individual shots not only reduces the processing time when stacking, but also significantly reduces the storage space required.

                                    Support@Seestar
                                    Here is an example of Markarians Chain from last night ( image rotated to match the chain image) . As you can see I have it framed one way and the software skews it another way. I have tried it with the Sky Alas in Alt-Az mode and in EQ mode. The map in EQ mode worked better but as you can see it is not correct. The framing seemed to work OK when Seestar S50 is not in EQ mode.