414 v 460

Robin Leadbeater

Hi John,

If specifically for an ALPY then as Paul says, the 414 is a good choice.  Be aware though that the 414 is best avoided if you think you might want to use it at high resolution with a LHIRES for example where severe (cover glass originating) fringes can be produced with cameras using this CCD. (Strangely the earlier generation 314 did not have this problem)  The 460 (and its smaller brother the 428) is free of fringes at high resolution but does show some waves in the spectral response at low resolution (due to the CCD internal layers) with the ALPY, though these are not severe (still better than the Kodak KAF CCD for example in this respect) and are effectively dealt with by the flat correction.