Clouds on Venus

Venus, June 3, 2023, 18:20
Kazan, right bank of the Volga River, Venus altitude 40°.
- Sky-Watcher Dob 12″ Retractable SynScan GOTO
- Explore Scientific 5x Barlow lens
- ZWO ADC atmospheric dispersion corrector
- Violet filter W47 + UV/IR cut filter SZS22 (in blue and green channels), violet filter W47 + yellow 720-900 nm filter (in red channel)
- ZWO ASI 462mc color camera
Stacking in Autostakkert: 8 stacks, 2000 frames out of 8000 for blue and green channels, 1 stack of 2000 frames out of 8000 for the red channel.
Capture settings in FireCapture:
Filter W47 + SZS22: fps 101, 6.893 ms, gain 214.
Filter W47 + yellow: fps 74, 2.179 ms, gain 182.
Observed before imaging. The violet filter W47 with an 8.8/82 eyepiece + 2x Barlow showed cloud features on Venus at 340x magnification at 17:00, altitude 50°.