Jupiter on my mind ~ plus echoes of Mr Herschel.

Afocal method

Last night I tried a bit of afocal photography with my little Hitachi DZHV582E digicam.

I've had this little camera for about 18 months, and in that time I reckon it's been used practically everyday for one thing or another. Mostly it's used to capture my solar pictures and videos.

If you ever see one of these little cameras.. .grab it... it's ideal for afocal photography.

Well worth the intial £40 I paid for it.

Capturing the Jovian Light...

I trained the Tal1 onto Jupiter and placed the 25mm plossl plus x3 Barlow in the focuser.

This gave me a magnification of x96, anymore and the image started to degrade.

I then simply placed the camera over the eyepiece (afocal method) and over exposed the shot to capture the Jovian moons

As many amateurs know, by exposing for the satellites I completely washed out any detail in the actual planet -  as you can see in this picture.

Over Exposed

I then under exposed the next shot to capture the detail in the planet  as shown here.

Under Exposed

After some copy/paste and a bit of further tweaking, I managed to secure this final image.

Now that I've figured out the camera and photoshop settings, I will be able to log many more Jupiter images on this blog.


Musings on the perfect planetary reflector:

Jupiter has always been a difficult planet to view and photograph with my small Tal1 telescope.

But considering the size of the Tal1 main mirror (110mm) I'm not going to complain.

For many years I've wondered about making a small planetary-only reflector.

Much has been written about the merits of a 6 inch f12 spherical mirror reflector.

Many say this type of telescope would be ideal for planetary work.

Plus a spherical mirror would hopefully be easier to produce with these Welsh hands.

Mr Herschel's 6 .2 inch/f13 reflector

I've a mind to try making a 6 inch f12 reflector.


I've read that Sir William Herschel made, and favoured a 6.2 inch f13 reflector.

If it was good enough for Mr Herschel, then it's good enough for me.