When do I need the IMP85 37 mm Extension?
You need this 37 mm extension when your camera, filter wheel, or other accessory requires additional backfocus to reach the correct focal plane with the IMP85 Instrument Port Selector or IR90 Focuser. It provides a fixed, rigid spacing solution.
How does the 37 mm Extension help create a parfocal system with the IMP85?
The IMP85 allows switching between three instrument ports. To make these instruments parfocal (focus at the same point), you often need to adjust the path length for each one. This 37 mm extension is one of the components used to equalize those path lengths, minimizing refocusing when you switch from, for example, a camera to a spectrograph.
Is the IMP85 37 mm Extension required for all cameras?
No, it is not required for all setups. Its necessity depends entirely on the backfocus requirements of your specific camera and any other accessories in the optical train. It is a problem-solving component for achieving specific spacing.
Can I use this 37 mm Extension for my remote observatory's imaging setup?
Absolutely. This extension is ideal for remote observatories using the IMP85 system. It helps create a permanently mounted, parfocal setup with multiple instruments, reducing the need for manual reconfiguration. For example, you can use it to correctly space a planetary camera on a side port of the IMP85.
What problem does the 37 mm Extension solve on a public observatory telescope with an IR90 focuser?
For a public observatory, this extension allows a camera to remain permanently attached and parfocal with an eyepiece. You can switch from visual observing with guests to imaging with the camera without lengthy setup changes, by ensuring both optical paths come to focus at the same point.
Is the IMP85 37 mm Extension part of a larger modular system?
Yes. It is designed as a component for the highly adaptable ecosystem around the IMP85 Instrument Port Selector and IR90 Focuser. Various adapters and extensions are available to accommodate a wide range of telescopes and imaging equipment.