Canon RF 75-300mm f/4-5.6: Price. The last time I was completely underwhelmed by a Canon 75-300mm lens was back in 2009, when I tested the EF 75-300mm f/4-5.6 III after it had already been on sale ...

The optical diagram for the 300mm f/4.0 IS PRO lens showing the positions of the exotic glass elements. (Source: Olympus.) The optical design of this lens consists of 17 Elements in 10 Groups and ...

The Olympus 300mm f/4 might look a monster, but it's actually a fraction of the size and weight of an equivalent 600mm lens on a full frame camera. That's not all.

The Canon RF 75-300mm F4-5.6 is a new compact and lightweight 4x telephoto zoom lens aimed primarily at entry level EOS R users who are looking for zoom on a budget. There's an element of nostalgia ...

The completed satellite with lens aboard. Ricoh Japan SHARE. The latest bit of camera equipment to be shot into orbit is the Pentax SMCP-DA 300mm f/4 ED—a relatively affordable telephoto lens for ...

Tamron 70-300mm f/4.5-6.3 Di III RXD Performance Looking first at sharpness, at 70mm the centre is excellent from f/4.5 through to f/16 and remains very good at f/22.

In summary the main positive points of the Sigma 70-300mm F/4-5.6 APO DG Macro are: Excellent optical performance for price. Good close focus ability (1:2) Light enough to carry all day.

Based on 17 elements in 12 groups, the Tamron SP 70-300mm f/4-5.6 Di VC USD features both a Low Dispersion (LD) and Extra Low Dispersion (XLD) element to boost image quality and reduce chromatic ...