I have a TS-Optics PHOTOLINE 130 mm f/7 FPL53 Triplet APO Refractor (APO130f7-P) on order from Teleskop Express. It ought to be shipping to me soon. I have also ordered the TS 1.0x flattener (TSFlat2,5). I understand that the flattener with this scope has a back focus of 88mm. Unfortunately, that may not be quite enough spacing for me to accommodate my FLI camera, FLI filter wheel and Astrodon MMOAG with needed adapters, although I'm still working this out as it may yet work but with a tight fit. (Thankfully, I am able to easily fit in my QSI 683-wsg with room to spare.)
Could somebody please tell me what approximate spacing there is between the last lens cell of the scope and the flattener? I've not been able to get that information from the web nor through communication with Teleskop Express as of yet. I'd like to know if it's feasible to place the MMOAG between the scope and flattener. Not finding any dedicated TS forum (Is there one out there?), I thought I'd pose the question here and see if anybody has experience with this.
P.S. Addendum: I just went through the spacing calculations more carefully, and I'm happy to say that with the FLI equipment + MMOAG I now come up with about 4mm to spare placing everything after the flattener. PreciseParts can make an adapter from flattener to MMOAG as thin as 1.2mm, so expanding that to 5mm ought to work out just right for me. (I prefer PP adapters to be wider than just a mm or so as I find them otherwise really hard to separate later, even with some lubrication!) I would still like to hear if my plan to place the MMOAG before the flattener is feasible. Thanks again.
Edited by BenKolt, 22 January 2020 - 01:07 PM.