New models of digital cameras join the market one after the others,each camera is full of new technology and innovation ; such as high resolution full frame sensor ; accurate auto focusing system with more than 11 points of AF sensors ; sensitive auto exposure and high speed processer inside the digital camera , it becomes more easy to take better pictures than before , what the photographer has to do is point and shoot and let the camera do the rest for you.

          For some photographers in the world , they want to take photos which is unique and outstanding with the quality of fine art , they tried and found that they can get a better picture by using a DSLR  camera with classic lenses , the photo will show a different atmospheric which is nature,clear and full of emotion .

           M42 lens is one of the classic lens that photographers like to use , the lens was made for 135mm film camera , many countries manufactured the M42 lenses and it was so popular that it  became a standard and to be called the "universal mount" .



          Before the raise of bayonet mount , thousands of different  M42 lenses were made and shipped world wide . Most M42 lens were made of metal alloy barrel and optical glass which was hand-assembled and adjusted by experienced workers inside the factory , although the design of the lenses could not change a lot between different manufacturers , they preferred to put more effort on better materials and craftsmanships to improve the quality , such as they use stronger and lighter alloy to make the barrel ; they use different materials to make glass and increase the transmission of light ; they add muilt-layer of coatings on the lens surface to prevent glare and light reflection which will downgrade the image on the film , these technology make the lenses quality better and better , it also become the standard craftsmanships for every lens today ,  you can get a remarkable photo with these lenses even it was made many years ago.