I am selling a Coronado SolarMax 40 with T-Max tuner and BF10. Additionally I'm including the Televue 85 adapter plate (let me know if you don't need it maybe we can work something out). This is a complete system for H-alpha solar viewing on any telescope of less than 1000mm focal length (with proper adapter plate).
I think it's important to note here that although the SolarMax 40 is the same aperture as the less expensive PST, the SolarMax 40 system is far superior because of its much narrower passband (0.7Å vs 1.0Å) and resulting higher contrast which reveals more detail on the Sun's surface and in the corona.
“The SolarMax 40 was designed specifically for use on short fast refractors under 1000mm focal length. Though small in size, the 40mm filter is large enough to resolve fine detail in surface structure and on the Sun’s limb. The SolarMax 40 provides full-disk H-Alpha views when matched with the appropriate blocking filter on a suitable refractor.
All SolarMax series filters are sold in sets. The front mounted SolarMax and rear blocking filter. Almost all telescopes require an adaptor plate in order to attach the SolarMax, these are available from Coronado or through your dealer. (Most cost under $200.)
The SolarMax includes a T-Max de-tuning device. Some events on the Sun, notably active flares and coronal mass ejections (CMEs), are extremely fast moving. If such features occur on the disc of the Sun, their high velocity towards the observer results in their wavelength being Doppler shifted shorter than Ha. If the velocity is high enough, this wavelength could be outside the passband of the filter and the feature would not be observable. The T-Max allows the user to de-tune the SolarMax slightly to bring such phenomena into better visibility.
Focal length: less than 1000mm
Bandwidth: less than 0.7Å
Thermal Stability: 0.005 Å/C
Blocking: Full blocking less than 105 from EUV to far IR”
In my experience, these are fantastic filters for solar viewing and offer much diversion during daylight hours at Star Parties, etc.
Don't forget, light pollution has no effect on solar viewing. You can view from the comfort of your home or anyplace else as long as the sun is visible.
Additionally, the next transit of Venus is only 8 years away and will be visible from North America so avoid the rush...
The new cost for the Solar Max 40 with T-Max and BF10 is $1450.
The Televue TV85 adapter plate is $155.
Add another $25 for shipping and the current cost from Coronado comes to $1630.
The unit is in like new condition complete with paperwork and case. I even have the original shipping box.
I'll take $1400 for everything including shipping (Cont US) and insurance (add 3% for PayPal).
Thanks for reading...