3 or 4 vane spider which one

Thank you, Ritesh, for confirming my choice of a 4 vane over a 3!

Howard Lester


"Axel" wrote

Is the 3 vane spider really superior on planets over the 4 vane?

The benefit would be much less than, say, going to a smaller secondary
mirror. But every little bit helps when looking for the low contrast
features. FWIW, I have a Protostar 3-vane on my 8" Newt and under
dark skies I still easily see six diffraction spikes on Jupiter and
Saturn at low power, but they dim enough at high power to easily
ignore. On bright stars like Vega the spikes are very bright at
almost any power and kinda neat actually.

Ritesh

They're all compromises. Depends on what you want to compromise to best
match your specific set of personal viewing preferences.

I long ago settled on the four vane spider as best meeting my specific
needs.

To each his/her own...


--
To reply, remove the "z" if one appears in my address
"Larry Brown" wrote in message
...
FWIW
A three vane spider gives six diffraction spikes and a four vane spider
gives eight spikes--two are on top of each other so it looks like four,
but they will be brighter than the six spikes from a three vane spider.
I once saw a scope using thin piano wire--no spikes at all. Another good
solution is to glue the secondary to an optically clear window.
Expensive. The curved-vane spider seems to be the best compromise.
L Brown

Rich McMahon wrote:

All

Ive got an 8" newt that has a 4 vane spider in it now.. Im looking to
get a new and more reliable secondary holder. I maybe in the market
for a new spider..

Is the 3 vane spider really superior on planets over the 4 vane?

Which spider and diagonal holder would you go with? Also is it worth
getting the premium flats?

Rich

They're all compromises. Depends on what you want to compromise to best
match your specific set of personal viewing preferences.

I long ago settled on the four vane spider as best meeting my specific
needs.

To each his/her own...


--
To reply, remove the "z" if one appears in my address
"Larry Brown" wrote in message
...
FWIW
A three vane spider gives six diffraction spikes and a four vane spider
gives eight spikes--two are on top of each other so it looks like four,
but they will be brighter than the six spikes from a three vane spider.
I once saw a scope using thin piano wire--no spikes at all. Another good
solution is to glue the secondary to an optically clear window.
Expensive. The curved-vane spider seems to be the best compromise.
L Brown

Rich McMahon wrote:

All

Ive got an 8" newt that has a 4 vane spider in it now.. Im looking to
get a new and more reliable secondary holder. I maybe in the market
for a new spider..

Is the 3 vane spider really superior on planets over the 4 vane?

Which spider and diagonal holder would you go with? Also is it worth
getting the premium flats?

Rich

Catalina lowlands were flooded out. 19-24 inches of mud in the la Canada
wash. Thank goddess I'll be 400 ft higher on my own mountain.

Sabino canyon havin it tuff this year. Catalina State park ( the end of
the biking road) is closed. Pima County wants to buy the opposite side
of the road ftom me and extend the park See AZ Star between Golder
Rancher and E. Wilds on Lago Del Oro Parkway.

See you all real soon .


Cathy



Jan Owen wrote:
They're all compromises. Depends on what you want to compromise to best
match your specific set of personal viewing preferences.

I long ago settled on the four vane spider as best meeting my specific
needs.

To each his/her own...

Catalina lowlands were flooded out. 19-24 inches of mud in the la Canada
wash. Thank goddess I'll be 400 ft higher on my own mountain.

Sabino canyon havin it tuff this year. Catalina State park ( the end of
the biking road) is closed. Pima County wants to buy the opposite side
of the road ftom me and extend the park See AZ Star between Golder
Rancher and E. Wilds on Lago Del Oro Parkway.

See you all real soon .


Cathy



Jan Owen wrote:
They're all compromises. Depends on what you want to compromise to best
match your specific set of personal viewing preferences.

I long ago settled on the four vane spider as best meeting my specific
needs.

To each his/her own...