I've recently purchased a Quark to add to my H-alpha imaging system.
I'd appreciate feedback from quark owners who are also using 90mm or so aperture refractors....
Do you also use an energy rejection filter? or has heat build-up not been
a problem without one? (the manual says an 80mm limit...but who reads manuals )
Daystar says and most users follow the rule that you just need a uv/ir filter in front of the Quark up to 150mm . At 150 and over should use a front ERF
. I use mine with an 80 , 102 and 127 refactors with just a 2"uv/ir filter and no issues with heat at all.
I should add that if you have an oil spaced lens or rear elements thats a different matter.
Daystar says and most users follow the rule that you just need a uv/ir filter in front of the Quark up to 150mm . At 150 and over should use a front ERF
. I use mine with an 80 , 102 and 127 refactors with just a 2"uv/ir filter and no issues with heat at all.
I should add that if you have an oil spaced lens or rear elements thats a different matter.
Marke,
Just a correction...
ALL the manufactures of Petzval designed (rear element) scopes have confirmed in writing are 100% safe to use without an ERF.
They are all confirmed to be suitable for use with a Herschel wedge with no up front protection.
Marke,
Just a correction...
ALL the manufactures of Petzval designed (rear element) scopes have confirmed in writing are 100% safe to use without an ERF.
They are all confirmed to be suitable for use with a Herschel wedge with no up front protection.
I've recently purchased a Quark to add to my H-alpha imaging system.
I'd appreciate feedback from quark owners who are also using 90mm or so aperture refractors....
Do you also use an energy rejection filter? or has heat build-up not been
a problem without one? (the manual says an 80mm limit...but who reads manuals )
Interesting beastie...first light was late yesterday afternoon.
The field illumination is no where near as uniform as my front mounted etalons, but, that said I was impressed with the contrast...hence I'd pick one of these over a PST any day...sure a little more expensive, but better views IMHO.
It also double stacked well with the 90mm etalon...very contrasty!
I do hope you read your manuals .... ' checklist ' ....before departure and on finals ....
Have to say the A380 FCOM was a daunting document that familiarity with
was definitely required for continued employment ..but have to observe in retirement, I don't miss the hours of study before a Sim session in the slightest
was a daunting document that familiarity with
was definitely required for continued employment ..
I'll bet .... when in doubt ... read the ' Manual ' ... again and again and again
A Sim session ....I'll bet they throw up all sorts of ' scenarios ' at you ...!! ....little old lady walking down the runway right when your at v1
I'll bet .... they throw up all sorts of ' scenarios ' at you ...!! ....little old lady walking down the runway right when your at v1
V1 cuts in the A380 were not too difficult......occasionally we had a little fun
in the Sim.... Such as flying a B747 under the Sydney Harbour bridge (it was a tight fit!).
V1 cuts in the A380 were not too difficult......occasionally we had a little fun
in the Sim.... Such as flying a B747 under the Sydney Harbour bridge (it was a tight fit!).
Oh come on really...it's only a light twin .... ............. plenty of room..
I landed an ATR-72 on an Aircraft Carrier in FSX ...
Sorry ...didn't mean to go off topic, I'll keep quiet now...!!
I've recently purchased a Quark to add to my H-alpha imaging system.
I'd appreciate feedback from quark owners who are also using 90mm or so aperture refractors....
Do you also use an energy rejection filter? or has heat build-up not been
a problem without one? (the manual says an 80mm limit...but who reads manuals )
Daystar says and most users follow the rule that you just need a uv/ir filter in front of the Quark up to 150mm . At 150 and over should use a front ERF
. I use mine with an 80 , 102 and 127 refactors with just a 2"uv/ir filter and no issues with heat at all.
I should add that if you have an oil spaced lens or rear elements thats a different matter.
YOU are completely right
Daystar do NOT say you need a filter and you do not ONLY on oil spaced refractors Daystar clearly state this in leaflets and emails
)
....little old lady walking down the runway right when your at v1 
............. plenty of room..
