Canon E-77II Lens Cap. Ideal for photographers on the move, the professional L-Series EF 70-200mm F/4L IS II USM is designed to deliver superb image quality for a range of subjects in a compact and lightweight design. Built to withstand the rigours of professional use, its robust and weather-sealed for durable performance and the constant f/4I have an older Canon Extension tube (EF 25). What is the difference between it and the newer Canon Extension Tube EF 25 II. Also, if I buy an EF 12 II will it work with the older EF 25?
With its ability to focus life-size images onto the image sensor, the EF-S 60mm f/2.8 Macro USM offers true macro performance in the EF-S lens series. Having an effective focal length of approximately 96mm in 35mm format, it produces breathtaking close-up results. A minimum focusing distance of just 20cm gets you super close to your subject
Continuous focusing from 1:1 to infinity. With tubes you are limited to a particular range. Light loss is a general feature of macro, not just extension tubes. Old style macro lenses just extended, exactly like adding extension tubes. The new ones are internal focusing and change focal length, but you still have light loss.
Canon EF 25 II Extension Tube. High level water and dust resistance -- suitable for use in heavy rain. Trending at $12.48. NEEWER Auto Focus EOS EF to RF Lens Say the aperture diameter is untouched and the focal length doubled the projected image dims to 25% of its original brightness (2 f-stops). Conversely, if the focal length cut in half, the image brightens 2 f-stops. The Math: 50mm lens 12.5mm aperture = f/4 --- 100mm lens 12.5mm aperture = f/8 --- 25mm 12.5mm aperture = f/2 rXXryz.