Hi Samir, Dijana & fellow Nikon users, >I would like to hear some comments about PK13 and PK12 extension rings. I used to own a FM2n, 35/2 and PK-12. Using the 35/2 on the PK-12 plus a +2 Hoya Close up lens, I got pretty close to 1:1 lifesize. If you're using flash, it might be a bit tricky. But what I liked about the above combination is that while you can get 1:1, you get a wider view (less tighter crop) than compared to using the 105/2.8m Micro. I find this especially good a combination if you want to include some of the background in your macro shots, eg. a field of flowers (in the background) while focusing on one particular flower. >What is quality of pictures taken with these rings, especially compared >with 60/2.8 micro or 105/2.8 micro. I am planning to use these rings mostly with 85/1.8 lens. I suppose if you're not blowing the pics up too much (bigger than 10" x 12"), the quality is almost similar with the 105/2.8 or 60/2.8 Micros as the 35/2 and 85/1.8 lenses have CRC. >Is it better to use supplementary lenses NR 5T or NR 6T with 85/1.8 or is >better with PK12 respective PK13. I think its a safer bet to get the PK-12 and suppliment it with a NR 5 or 6T as you can have an option to what magnification you want. Unless you are sure the PK-13 is what you want. Its like asking, "Should I get the 105/2.8 for portraiture and use a diffuser or get a inherently soft lens"....I would say its easier to make a sharp lens soft (via filters or gel) than to make a soft lens sharp. Hope that helped. Regards, Deric Soh.