Was glad to get the chance to try the telephoto lens at Rho Ophuichi last Sat.
This was taken at F5/155mm zoom with a combination of :
20x 1min ISO 3200 using Baader UV/IR filter
8x 2min ISO 4000 using Hutech V3 filter
(all with darks)
Modified Canon 60D/Neq6
The data capturing presented its own challenges as sighting through a viewfinder opposed to a finderscope on a telescope made things a little tricky, sticky taping the focus on the lens to prevent slipping and trialling a stubby holder as a dew cover for the lens seemed to work OK except vignetting crept in a bit.
Overall was pleased to get a result albeit noisy/grainy.(The ISO was cranked up under the average dark sky in outer NE Melb). Plenty of fun and will have another go at widefield again I'm sure when the winter sky is kind on the next new moon.