Field flattener assembly

[Furgus]

Hi, so I disassembled my field flattener as I had a bug trapped inside that showed up on the images.  Stupidly, and you know whats coming, I did not make more than a mental note on how the lenses came out.  Now I am unsure if I reassembled correctly, the order is fine, but I am unsure of the orientation of both lenses now.  So for peace of mind would anyone know which way round, or any good way I can check?

It's this one btw:  https://www.rothervalleyoptics.co.uk/skywatcher-field-flattener-for-evoguide-50-ed.html

Thanks all!  After 3 weeks waiting for clear skies this is a stress I could do without. 

[happy-kat]

I hope it turns out all fine for you with the lens

[Furgus]

Ok I think I was ok in the end, for anyone with the same issue The lens orientation is with the concave side towards the target:

Target light - - - - - >    )___) - - - - > Camera

Hope that crude diagram helps!

Had to wait 3 weeks to test it mind because of a terrible UK October weather.  Anyway, I am pretty happy with the results on my little rig, attached a stack from last night.

[happy-kat]

that's super and great job in reassembly.