New performance improving product for colder regions
Blocking Filter Heating Module
Self contained heating module
Produces operating temperature in below freezing temperature viewing sessions for more than an hour on a single charge
Easy to install on all Lunt diagonal Blocking Filters
Charging cable included
Blocking Filter Sold Separately : US $179.00
Some Input Info why you want to buy this :
We noted that people wanted to doppler shift the etalon which moved the CWL of the etalon under the BF.
Ideally you want the etalon and the BF to be centered at the same point.
As you know a filter that has a thermal tolerance will drift off band as it gets closer to its wings.
Etalons are very thermally stable.
We moved the CWL up on the BF to allow for its use in hot environments. You can;t cool a BF effectively, but you can warm it.
People who want to use their equipment in low to sub-zero temps will appreciate this product. It will warm the BF filter enough to bring it well within band of the etalon.
I would recommend this product to anyone who will want to solar view in temps below 45F.
The heater will warm the BF for about 1 hour of continuous use on one charge. We are also making an extended life warmer that will warm for 2 hours.
Edited by APM M.Ludes, 01 September 2019 - 06:53 AM.