For more information and detailed picture,please visit our website: www.hansonstec.com
Any needed,please feel free to contact me.Thank you.
Tube diameter:ab.62mm
Tube Lenghts:(1)13mm (2)21mm (3)31mm
Image Magnification Ratios And Exposure Factors(50MM Standard Lens)
*The above table shows general values for 50mm standard lenses.Even with standard lenses individual lenses may have actual values slightly different from these.
*Image Magnification Ratio is the ratio in size(lenghts) between the subject and the image formed on
the film surface.For example,image Magnification Ration 0.24X means that a 1cm subject becomes
1X0.24=0.24 or makes a picuture of 0.24cm size on the film surface.
*When using an extension tube of same length,the image magnification ratio becomes smaller as the
focal lekgth of master lens becomes loger and the larger as the focal length becomes further awa as
the focal length of master lens becomes longer and closer when it becomes shorter.
*For other than standard lenses calculate according to the following formulas:
Length of Extens.Master Lens Tube+Advance Volume
Image Magnification Ratio=---------------------------
Master Lens Focal Length
Exposure Factor=(1+Image MagnificationRatios)²
(Master Lens Focal Length)²
Master Lens Advance Volume= ----------------------------
Master lens Distance Reading-Master Lens Focal Length
Image Size on Film Surface
Field Coverage=---------------
Image Magnification Ratio
Shenzhen T-Lin T Decroation Co., Ltd iS specializes in interior decoration and sales of high-grade materials and decorations, etc., years of credit management let us won a good reputation in the industry.
Shenzhen T-Lin T Decroation Co., Ltd will initiate the second phase of our development strategy. Our company regards "reasonable prices, efficient production time and good after-sales service" as our tenet. We hope to cooperate with more customers for mutual development and benefits. We welcome potential buyers to contact us.
