Occasionally, DayStar accepts a used trade-in filter for upgrade. Those used filters are available with in-stock status for immediate shipping. Pre-qualified filters carry a transferrable warranty with the remaining balance of the original 10 year warranty. DayStar tests each trade-in filter to qualify the condition, features and FWHM bandpass of each filter traded-in. New Filters also occasionally become available with In-Stock status through dealers.	DayStar Filters does not currently buy used filters.
LAST UPDATED July 27, 2017
Items In-Stock Today - Orders received & confirmed by noon ship same day.
Model Half-bandwidth Age Delivery Price Buy Now Original Quark Chromosphere Model NEW Changes hourly Check online cart call 866-680-6533 $1195.00 Original Quark Prominence Model NEW Changes hourly Check online cart call 866-680-6533 $1195.00 Combo Quark Prominence Model NEW Changes hourly Check online cart call 866-680-6533 $1195.00 Combo Quark Chromosphere Model NEW Changes hourly Check online cart call 866-680-6533 $1195.00 CALCIUM Quark 5Å CALCIUM H-LINE NEW Changes hourly Check online cart call 866-680-6533 $1195.00 Sodium Quark <.5Å Sodium D Line NEW Changes hourly Check online cart call 866-680-6533 $1195.00 Questar Quark Filter Chromosphere Model NEW Changes hourly Check online cart call 866-680-6533 $1195.00 Questar Quark Filter Prominence Model NEW Changes hourly Check online cart call 866-680-6533 $1195.00 80mm Quark/ Telescope Bundle Chromosphere Model NEW Changes hourly Check online cart call 866-680-6533 $1750.00 80mm Quark/ Telescope Bundle Prominence Model NEW Changes hourly Check online cart call 866-680-6533 $1750.00 Same day shipment on orders confirmed by noon CST, Mon-Fri If 'Last Updated' Date is not current, please feel free to call 866-680-6563 for stock status. LAST UPDATED July 27, 2017Items In-Stock Today - Orders received & confirmed by noon ship same day. Quark Adapter Quark-T Adapter NEW In Stock NOW $45.00 Quark Adapter Quark-C Adapter NEW In Stock NOW $45.00 Quark Adapter Quark-2" Adapter NEW In Stock NOW $45.00 Solar Finder HelioPod Solar Finder NEW In Stock NOW $29.95 Quark Adapter T-Mount Interference Eliminator NEW In Stock NOW $175.00 Quark Adapter C-Mount Interference Eliminator NEW In Stock NOW $175.00 Quark Adapter 1.25" UV/IR Cut Filter NEW In Stock NOW $65.00 Quark Adapter 2" UV/IR Cut Filter NEW In Stock NOW $109.00 Imaging Accessory Focal Reducer NEW In Stock NOW $285.00 Quantum Adapters 4X Barlow Q434XGF and Q34X2D2 Plates NEW In Stock NOW $92.00

* HALF-BANDWIDTH: The term half-bandwidth refers to an optics industry standard of measure.  On a chart depicting the peak where light is transmitted, that peak's width is measured at the point 50% between zero and full transmission. This term is called half-bandwidth.