Step Up Ring 58-72mm Picture Frames The foam pad ensures that

The foam pad ensures that the printing paper is in total contact with the negatives once the glass plate is clipped shut

can be improved significantly

This liquid chemical

The later model 40A lens discarded this model's CF macro ability and instead uses a macro button and macro helicoid

Each color can be used individually or in combination with other colors for spotting any black & white print

Step Up Ring 58-72mm Picture Frames The foam pad ensures thatStep up rings are used when you need to mount a filter that's larger than the diameter of your lens barrel. The first number refers to the barrel size, and the second number indicates the filter size that will fit on the ring. Step up rings are a great way to save money on filters, since instead of having to buy several different sizes of filters for your various lenses, you can buy just one large filter and several inexpensive step up rings instead.