The CFI Plan Apochromat VC series objectives are the best performing objectives, which can perfectly correct chromatic aberration in the visible range and have excellent resolution in the entire field of view. They are ideal for multi-color fluorescent samples and when using brightfield and DIC technology. In addition to the correction range of the conventional Apochromat series (435-660nm), the axial chromatic aberration can also be corrected to the violet range (405nm), making these objectives very effective PA-GFP and other photo-activation and photo-conversion proteins that activate at 405nm. CFI Plan Apochromat VC optics are also ideal for critical confocal work.