Edward Dewolf

I am looking at buying a deep-cycle battery to power my setup away from home: VMF VDC31M 105Ah Deep Cycle As I never had one before, I am wondering how to maintain it in between sessions. Do I have to keep it on the charger as the selles is suggesting? he says the charger will just keep topping it up little by little, trickling, .... Do I have to, or can I just top it up just ahead of a session? Any advice would be appreciated Edward

I have a F5 newt, skywatcher 150/750 DPS, .... would that require the 36mm ones?

So I was looking at the asi1600mm pro and noticed it also comes in packs containing a filter wheel and filters. Bit the filters come in 2 sizes: 31mm or 36mm. 31mm is 1.25". But what is the 36mm size for? Why are there 2 options? is the 1.25" not latching the size of the camera chip? Will it not generate a full image? Can anyone explain? 36mm is too small for 2" right? Can anyone explain why there are 2 sizes and how I would limit myself going for one or the other? Thx!! Edward