Re: Extension Tubes on 100mm 2.8 L macro. In reply to quadrox • Apr 27, 2011. Adding a set of 25mm + 12mm tubes will get the magnification to about 1.6x. That's not a large magnification increase, but it may match the framing of the subject to the sensor better, which is important to get more pixels on the subject. Regards, Bill. Canon EF 12 II Extension Tube Overview R5 1.1% Sony Cyber-shot DSC-RX100 VII 1.1% Canon EOS R6 1.1% Canon EOS M50 Mark II 2022 Digital Photography Review All EF12 II versus EF 25 II extension tube? Started Jul 11, 2011 | Discussions thread Forum: Parent: First: Previous Canon EOS Rebel SL3 review. review Jun 12, 2019 The last image uses a Canon tube (25mm) tube plus all three Kenko tubes (12+20+36mm) combined. This gives something like 2.5:1 magnification, but the overall image quality has dropped quite a lot. Also at this point you are so close that it can be hard to avoid the lens barrel casting a shadow on the subject. Extension Tube EF 25 II. 25mm fully coupled Extension Tube for EOS camera and most lenses to 350mm. Merchandise type. Need to order more than 10? Learn More. Need help making a purchase? Contact a Sales Expert at 800-385-2155. Adding extension tubes to a wide angle lens generally makes a dramatic difference in that lens' abilities to focus closer. With the Canon EF 12mm Extension Tube II behind it, the 35 IS has a 0.60-0.36x MM spec. Use the Canon EF 25mm Extension Tube II and MM goes to 1.04-0.79x. This lens is not compatible with Canon Extenders. View and Download Canon EF 25 instructions manual online. Extension Tube. EF 25 camera accessories pdf manual download. Canon lens hood et-161 for ef 600mm 1:4.0 The Canon EF-S 60mm f/2.8 Macro USM can get a magnification of up to 1.61. That means an object that's 10mm in reality is 16.1mm on the sensor. As a comparison the table also has the EF12 II extension tube and with the 50mm lens I would only have gotten a magnification of 0.39 using that. So I'm guessing I made the right choice when I got the kGrCsX9.