UV/IR filter required with 80mm frac and Quark

[Rattler]

Hi guys. Is a UV/IR necessary on a 80mm refrac with Combo Quark? I believe it's around 80mm it's required. I do have one but forgot to bring it with me to my parents with my solar rig. Cheers.

[xtreemchaos]

you should be ok with a 80mm, thay recommend to use one after 80mm. charl.

[michael.h.f.wilkinson]

Note that a Combo Quark is meant for SCT with off-axis ERF, or refractors slower than F/15. Your ES 80 mm triplet sports the same F/6 optics as my APM version, I believe, so you will need a separate tele-centric lens of 2.5x or larger magnification. I use a Baader TZ-4 4x tele-centric, and a full aperture ERF with my Solar Spectrum H-alpha filter. The ERF might not be needed for the tele-centric lens used, in the case of the Combo Quark, but I am not sure of that. In summary, you should NOT use the combo quark without tele-centric lens in F/6 optics. Even if it might stand the heat, the wide light cone means you do not get the narrow band pass

[Rattler]

Yeah, I'm aware of that bud. I use a 4x Powermate  and 5x Altair barlow,

[Solar B]

Yeah reckon your fine at 80mm , I've used my regular

quark at 150mm using the Baader 35nm but wouldn't

recommend at that aperture with a reg UV/IR.

 

Brian