Not a lot. The An-26s don't move much - if you're lucky you'll get a couple on the ground at the maintenance area, but you do need ladders. Most of the time they seem to be out performing their duties, but I have seen them take-off/land.
At the minute I think there are two RAF Avia An-26s based (YL-RAA & 'RAE) and also an all-white Budapest Aviation Services An-24 (HA-TCY
Summer evenings are best, when from 7pm you get a massive influx of cargo traffic. In mid-June you can have a good couple of hours with the sun at your back. The constant procession usually features the following aircraft:
Lufthansa Cargo MD-11 (x2), Evergreen 742F, DHL 752F (x2), DHL A300 (x2), TNT A300, TNT 733QC, Atlantic ATP, Star Air 762F (x2), UPS 763F, Jet2/Channex 733QC.
An-124s are also regular visitors, and less so the An-225 and An-22, however they don't move every day so catching them is difficult. If you want the Kalitta 74F, it's due every Saturday at 13:40.
[Edited 2008-01-03 07:25:07]