Meopta Magnitarus 13x18 print 6x6

Hi everybody,
Possible somebody could help me how to resolve my issue.

I bought for very small price the enlarger Meopta Magnitarus 13x18. I ll plan to use it for printing from the middle format negative 6x6 cm. and get a good quality print by size 20x20 inch. But, when I have tried to print I discovered, that max size of the print from 6x6 negative is only 11x11 inch.

I searched information over internet and found that the each enlarger has own optical schema for printing from specific film format. My old enlarger is Meopta Opemu 5 allows to print the size 20x20 inch but i need to place an easel on the floor. When I decided to buy the BF enlarger I thought that I will print from a middle format without any issue the big size. Also this enlarger has a mask 6x6 cm.

Does it possible to print on Magnitarus a big print from a middle format? May I need to install the another lens with focus 60 or 70 mm? Just now the lens 210 mm installed there

AlexRT said:

Just now the lens 210 mm installed there

Click to expand...

That is a very, very long lens for a 6x6 negative or a medium format enlarger. It is not surprising at all that it is difficult to make reasonably sized prints.
A 210mm lens would normally be found on an enlarger designed for something like 13 cm x 18 cm.
The standard lens for 6x6 would be an 80 mm lens. You should look for a lens like that to replace the one currently on the enlarger.