Re: [ccp4bb] Apochromatic and Achromatic

2011-07-31 Thread Jürgen Bosch
What type of camera were you thinking to add to the microscope ? Faveon based chip ? 30+ megapixel regular CMOS based chip ? If the answer to both is no, then go with the cheaper lense (achromatic). After all it is not about the beauty of the crystals, if they diffract or not does not depend on

[ccp4bb] Apochromatic and Achromatic

2011-07-30 Thread Ramanathan Natesh
Dear All, In crystal examination stereo zoom microscopes, how important is it if one chooses a Achromatic objective lens compared to Apochromatic lens. Achromatic can give higher working distance ~ 70 mm or more as compared to Apochromatic, which may be important for picking cryst