Extension Tube Gear

The number tells the length of the tube. There are several (4-5) different lengths and they can be combined to make them even longer. With a 80 mm lens you need a total of 80 mm extension to get 1:1, that is to focus on an area of 6x6cm in real life. 40mm extension will give you 1:2, or 12x12 cm subject area. Part of that extension can come from cranking the lens to its closest focusing distance. This gives about 8-10mm. The rest you need to add by putting an appropriate tube in between the lens and the camera. So 32mm would be right for 1:2. 56 would give you about 1:1.5, not quite to life size (1:1). For that you would need to add a shorter tube as well. The good thing about the Hasselblad system is that all old and new accessories can be used (as long as they are for the same system, not the very old 1000F or the new H1).

Your camera will work with Hasselblad's V-system extension tubes, the following models do exist: 10, 21, 55, 8, 16, 32, 56, 16E, 32E, 56E. There are no compatibility issues between your camera and any of these extension tubes. You do not need other accessories. To determine which sort of extension you need for a desired magnification go to www.hasselbladhistorical.org. (I have a 10 mm tube for sale that makes sense with a 80 mm Planar)

Ulrik

As mentioned above , you can combine extension tubes .The sequence (for example 10+32 or 32+10) does not matter . But you should not combine more than 2 tubes . Important ! ! ! Always attach tube(s) first to the body and then the lens to the attached tube . In that sequence . When you remove the tube(S) reverse the above sequence . First remove the lens and then the tube in different steps . If you should have removed the tube with the lens attached , NEVER try to remove the lens from the tube in this state . This will definately destroy the 1/2sec and 1sec mechanics in the shutter . So what you do in this case , attach this "assembly" back on to the body , and detach as described above .

Jurgen, I'm not aware that you can damge the shutter (and some particular speed) by removing the combination tube+lens in the wrong order. For what I know the only problem arising is that the lens' shutter close and you need to manual re-cock it to attach the lens to the camera body. I incurred in this problem before I discovered the right order of detaching, and never damaged the shutter.

Diego

Might be that i am misunderstood , as my english is not so perfect . Give me a second try . Assume , you have a 16mm tube and a CF100 lens attached . Now , you remove of whatever reason , this "unit" of the tube and lens in one piece from the body . No problem . But now , if you decide to seperate the tube and lens(not attached to the body anymore) , then , this will cause the trouble . It happened to me and i am not the only one . It cost me a lot of money to get it repaired . By the way , after i fell into this problem , i found it described "somewere" in the HASSELBLAD documentation , but i can not remember where . Might be in the instruction manual for the extension tubes . But no one reads these anyway. So did i .Puuuuuuhhh .

Jurgen, I do not say you are wrong or you do not incurred in the shutter damage, I removed the tube+lens in the wrong way as you described (several time untill I understood the righ sequence) and never incurred in shutter damage; only had to manual re-cock the lens. May be I have been lucky! But It happear quite strange that this could damage the shutter. But your explanation on how to remove the lens+tube is right: you must detach the lens first, then remove separtely any single tube untill the last one attached to the body.

Jurgen is right on with the order of assembly.

The tubes can jam if assembled or disassembled in the wrong order. There is a spring-loaded shaft extension that connects the body with the lens through the extension tube. If it becomes unlatched, it will jam to the lens body or next tube. AFIK, you could cock it again with a coin, but I haven't pressed my luck. If it releases when the lens is partially removed, you could get more serious jam, requiring factory service.

If the lens is half-off the cocking shaft extension when it accidently releases, turning the shaft to cock it causes the lens shaft to turn in the wrong direction. The lens shaft is under considerable tension due to the shutter mainspring. You might be able to wiggle it back into place, but there are no guarantees. Think $$$ before you act.

Maijaliisa,

An online Hasselblad V-System Close-Up Calculator can be found here.

You must remember the available tubes's length in mm: 8 (10) 16 (21) 32 (55) 56 (The ones in brackets are the older, but still usuable types. The other ones are the latest type.)
Select your 80 mm lens (or any other lens) from the menus above, and go to the input fields "Total extension" and "Extra extension".

When you enter the tube's length in the "Total extension" field, and hit the "Calculate button", the calculator will show all the relevant data (including among others focussing distance, field of view, and exposure compensation) describing the situation with the tube and lens attached, and the lens' focussing ring set to the infinity mark.
enter the tube's length in the "Extra extension" field, and hit the "Calculate button", and the calculator will show all the relevant data describing the situation with the tube and lens attached, and the lens' focussing ring set to the lens' close focus limit.

Thank you all for all of the great information, instruction, warnings and links!