It's a mixture of silicone oil and immersion oil, you can also buy it from TCI. It is super viscous and a bit oily though so takes some cleaning (we soak in detergent followed by a lot of water and ethanol) so I would check with Zeiss first
It's a mixture of silicone oil and immersion oil, you can also buy it from TCI. It is super viscous and a bit oily though so takes some cleaning (we soak in detergent followed by a lot of water and ethanol) so I would check with Zeiss first