Thank you for your reply. I uploaded images to google drive . I am not a specialist, but bias frame looks good (exptime = 0.0001 sec). All images are raw lights (uncalibrated). All images (unguided) has 60-sec exposure time. Except M57: 300 sec singleshot, guided. About specific exptime. Maybe. I saw this gradient on 10-sec images. Test flats also look strange with exptime = 0.02. I checked option Vdd, it was set to OFF. I tried different cables (the native one is too short). The images from Envisage I also uploaded to Google Drive.
May be, I always must to use filters (L, for example)? Or may be, I must to close side holes on the camera, where shipped the filter slide?

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