latest news

Custom refractors

We now offer custom built refractors with world class optics from APM in Germany. For more info please mail to: info@jtwastronomy.com

Instrumentation specialist

Thanks to the acquisition of new, large machinery we are optimising our facility towards making custom instrumentation - large telescopes, mounts, optics, etc. For more info please mail to: info@jtwastronomy.com

Astronomy news

Check our selected RSS feeds with the latest astronomy news

read more ...

other information

New Sony A7s Astro-Ready (2 year warranty)

This is a new Canon 6D camera which has had the colour correcting OWB low pass filter removed. This greatly increases sensitivity, especially to longer wavelengths such as h-alpha (around 300% improvement). Our modification work is carried out in a controlled clean room environment by highly experienced hands. Buying from a registered company you can have confidence in not only a quality product but also the peace of mind from a company that has modified thousands of cameras over the years, from hobbyist to professional film use.

Sony A7s astrophotography modification

Our modification is not only the removal of the filter but also a correction to the optical path. There are three additional benefits to this type of modification besides the large increase in sensitivity. This maintains the correct spacing for the corrected imaging circle of your lens. This also maintains infinity focus and autofocus capabilities. Finally the removal of glass from the optical path reduces diffusion and will sharpen the images, especially in the corners and especially with fast lenses. Our modification is totally transparent to the user, the camera just works as before, just with greatly increased sensitivity and 100% compatibility with off-the-shelf accessories.

Sony A7s astrophotography modification

All cameras are offered with a two year warranty and a 30-day no questions asked return policy. We provide complete systems, including, software & cables. You also receive free access to software and driver updates for life.

Modified new Sony A7s - 2399,99eur (inc. BTW)

Email us now! Filter installations on request

Images all (c) F Hemmerich