How to calculate exposure time during suneclips

When making pictures of the sun and during a totality it's important to have the right settings. You can experiment yourself upfront with the sun high in the sky and using your solarfilter. Try out shutter speeds from 1/8000s -1s for different ISO numbers and f/stop numbers and see what's the best result. As long as the sun is visible this setting can be used. During totality settings need to be adjusted and without filter.

For more information see this calculator or see below chart for settings during totality and what detail (chromosphere, corona,..) you want to photograph

Weather Summary May 2017

As a summary May 2017 was a warm and dry month.
Average temperatures are up to 2°C higher then last three years. In comparison with last 4 years, May 2017 was a very dry month with 23 dry days and only 45 liter/m2.

#500 Blogs

Celebrating my blog #500 all related to promote astronomy, solargraphy or related sciences.

Sunspot AR2659

Sunspot AR2659 is good visible and almost ready to leave to frontview. This picture was taken using Baader AstroSolar film. 

The picture below is from the same sunspot but taken afocal from 24mm ocular and samen settings.

Venus & Airplane during daytime

When observing Venus during daytime an airplane crossed my picture.

Venus during daytime

It was a long time ago I obverved Venus during day time. This afternoon, with a blue sky, I found Venus South West of the sun. My scope was pointed at the sun and using the coordinates from the Astrocalender Heelal. It was rather easy to locate Venus as it showed up as a very bright dot within the finder. Currently Venus is 46% illuminated.

Sun with prominences using PST40

This afternoon the temperature went up till 29,5°C. Clear sky and thus time to take some pictures of the sun using PST40. A total of 3 prominences could be observed.