Originally posted by kacansas03 I have used the 01A with an equivalent extension tube. It gave good magnification. The best magnification was achieved with the 01A and a 1.4X teleconverter and 2X TC. If you read the Adaptall.org site at all it addresses these issues and even has lens tests. I think anyone shooting Macro wants to use extension tubes since added glass elements results in image problems creeping into your work. However the best magnification I ever achieved was with a 52A and a 2X TC which resulted in an area 1/2 inch by 3/4 inch in life totally filling the 35mm image frame. I do not know what the level of magnification was but the image was sharp, clear, bright with no color aberrations. This is just relating my experience.
Thank you for your answer. Marks on the lens says that with 01f teleconverter it should archieve 1:1.1 magnification at 80mm. The thing I learned about extension tubes is that if I use 18F extension tube (45mm) 01A should archieve the same 1:1 magnification at 45mm but at much closer distance to subject. But
extension tube calculator says that I should archieve little more than 1:1 magnification even at 80mm and at 45mm it should be about 1.5:1.
But with Tamron 72B which have native 1:1 I should archieve the same 1.5:1 magnification at 90mm. The difference should be in distance to subject and with 01A at some focal lenght the focusing point may appear even behind the first lens.
If I use 01F teleconverter and extension tube at the same time, it's the same as 180mm lens with 45mm extension tube or something changes? Logically, I understand that with 1:1 macro lens I should archieve 2x more magnification than with 1:2 macro lens at the same focusing distance. But what will happen if focal lenght of 1:2 macro lens will be shorter? 80mm, 45mm etc.