an extension tube with the identical length of the focal length will always give you 1:1 and reduces the light by 2 stops.I just scored the 55mm f3.5 macro Nikkor for my Nikon HP F 3. I gather that an extension tube is needed to focus to 1 to 1. What length tube is needed? The F 3 is quite a contrast to my Pentax LX cameras! The Nikon should make a fine defensive weapon, should the need arise....
Many thanks for the rapid responses! I should have also asked if anyone has for sale a right angle finder to fit the F 3. While my K series Pentaxes and Olympus O series cameras can share the same RF adapter, the F 3 uses threads for the eyecup, unlike the slots on the Olys and Pentaxes....
A little magnification of the screen is nice. Also, unlike my Pentax LX, I strongly suspect that light falling on the screen would influence the exposure.Why don't you just take the prism off?
Right you are! However the 55mm macro, able to focus to 1:2 itself, already incorporates considerable extension, so 55mm added extension would give more than 1:1, not in itself a bad thing.....an extension tube with the identical length of the focal length will always give you 1:1 and reduces the light by 2 stops.
Many thanks for your comments! I have for my Pentax LX a, for the want of a better description, a viewfinder which furnishes a magnified image of the screen. Here's a link: https://www.pentaxforums.com/accessoryreviews/pentax-fe-1-waist-level-magnifying-finder.html However. While it is wonderful for horizontal shots, it is a PITA for vertical format shots, as would be using a waist level finder. Since I enjoy close up shots of flowers, bugs, etc, the right angle finder would be more desirable than a waist level finder regardless of its other virtues.I would suggest you look at purchasing the DW3 waist level finder for the F3, brilliant bit of equipment and travels with me wherever the F3 goes. Takes up minimal space yet enables one to take pictures in really difficult places. Effectively, they make a right angle finder obsolete. Once you use one, you'll never like to go back to a right angle finder.
As an alternative, you can take the prisim head off and use it directly, something I have done several times with my 24mm and held above my head for above the crowd shots, works a treat.
The Waist level finder also has a 6 times centre magnifier, makes for super clear focusing right to the edges of the film. If you really need high magnification for super critical focusing, then the DW4 is about as good as it gets.
I have both of these finders, and they both have their good points, but the waist level finder is the accessory I use the most.
Mick.
However the 55mm macro, able to focus to 1:2 itself, already incorporates considerable extension, so 55mm added extension would give more than 1:1, not in itself a bad thing.....
I have the f/2.8 55mm Micro Nikkor, when I have the PK-13 extension ring on, the edge of the lens is quite close to the subject when focused, I doubt you could use another extension ring to get greater magnification without almost touching the subject.
Remember, Mick, that the 55/2.8 is made to be used oriented normally with the "hood" facing the subject at magnifications no higher than 1:1. It should be reversed when used at higher magnifications. The Nikon F flange-to-film distance is 46.5 mm. All lenses in F-mount focus to infinity (magnification = 0) on the camera. At infinite magnification, a reversed lens in F mount's flange will be 46.5 mm from the subject. At lower magnifications, farther away.
In other words, you've brought up a non-problem.
Yes, and all the same length.There were at least 3 Nikon extension tubes for the 55mm f/3.5 Nikkor. The M was introduced in in the mid-1960s, the M2 with the Micro-Nikkor 0f 1970, and the PK-3 in 1977. As far as I know, each could be used with any Nikon mount lens.
If you're going to use the lens at magnifications above 1:1 you should reverse it to take best advantage of its optimizations. Nikon makes couplers that screw into its filter threads so it can be mounted reversed on a bellows or tube, also a ring that, when used with a double cable release, will stop the reversed lens down when the exposure is taken.
I would suggest a Vivitar Macro Focusing Tele-Converter insted of an extension tube.
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