Modern Classic SLRs Series :
Nikon F - Nikon F Large Format Backs

 

In general, the Speed Magny system is designed for use with Polaroid instant-development film. This is most useful for checking lighting and for very fast reportage. Later on, third parties (generally Marty Forscher) would produce special backs for Nikon's F series which allowed direct (i.e. not through the complicated optical gyrations that the Speed Magnys provided) taking of instant pictures.

When the light leaves the rear of the lens, it would normally strike the film residing at the film plane. With a Speed Magny back attached, the light strikes a condenser field lens, reflects off a first-surface mirror set at 45 degrees to the light's path, is sent through an EL-Nikkor relay lens to magnify the image, and reflects off another first-surface mirror at 45 degrees, finally striking the large-format film. In order to make the Speed Magny attachments somewhat compact, Nikon chose to make the two mirrors perpendicular to each other, rather than parallel (as in a periscope), so the film chamber resides under the lens, with the emulsion side facing away from the subject.

Mounting a Speed Magny is fairly easy, since it replaces the current back completely:

    1. ensure that the condenser lens is dust-free
    2. attach the back to the F via the open/close key
    3. screw the Speed Magny to the tripod socket via the small thumbscrew
    4. lock the thumbscrew with the larger dial sitting immediately next to the camera

Note that because 3.25 x 4.25 and 4x5 have different aspect ratios than a standard 35mm frame, the viewfinder shows slightly more area than will be captured on film. The actual area is approximately 95% of the vertical and 74% of the horizontal; perhaps the T screen would be somewhat useful in outlining this area. This is independent of the vignetting caused by different lens's focal lengths (which in turn is governed more by the location of the lens's exit pupil). These are tabulated below.

Vignetting Characteristics:
Severe: (projected image forms a complete circle on film, with a continuous black border)
Moderately Severe: (projected image forms almost a complete circle on film, with a two-piece black border)
Moderate: (projected image is darkened in all four corners)
Minor: (projected image is darkened in three corners)
None: (no image darkening)

Speed Magny 100

Overall Length: 170mm (7.5 in.)
Width: 190mm (8.7 in.)
Height (from prism to bottom): 245mm (9.8 in.)
Weight: 1900g (4.3 lb.)
Film Format: 3.25 x 4.25 in.
Magnifiying Relay Lens: EL-Nikkor 50mm f/2.8
Magnification Ratio: 3.2:1 (i.e. multiply 35mm focal length by 3.2)
Films to be Used:
(mainly) Polaroid Land Film Type 107 (ASA 3 000)
Polaroid Land Film Type 108 (ASA 75 [Polacolor] -- replaced by Polacolor 64 Tungsten and Pro 100, T-79)
Polaroid Land Film Type 105 (ASA 75 [Pos/Neg] -- obsolete and no replacement)
Exposure Factor: 18 (i.e. divide ASA of film in use by 18)
Film Holder: built-in (Polaroid CB-100?)
Relay Lens Cap: included, acts as darkslide

This Speed Magny is supplied with a relay lens cap, which caps the EL-Nikkor and allows the Speed Magny to be removed without fogging the remaining film. Rotate the knob clockwise so that the "C" mark lines up with the white dot on the body of the Speed Magny. Earlier models do not have this capping feature.

Those of you with Crown Graphics will be pleased to note that you can use 3.25 x 4.25in. film with this Speed Magny, too, although you can't remove the film holder, so you're stuck with what Polaroid chooses to supply, although they do have quite a range of films to choose from.

Speed Magny 45

Overall Length: 190mm (7.5 in.)
Width: 220mm (8.7 in.)
Height (from prism to bottom): 250mm (9.8 in.)
Weight: 1900g (4.3 lb.)
Film Format: 4 x 5 in.
Magnifiying Relay Lens: EL-Nikkor 50mm f/2.8
Magnification Ratio: 4.1:1 (i.e. multiply 35mm focal length by 4.1)
Films to be Used:
(mainly) Polaroid Land Film Type 57 (ASA 3 000)
Polaroid Land Film Type 58 (ASA 75 [Polacolor] -- now obsolete; use Polacolor 64 Tungsten or Pro 100, T-79)
Polaroid Land Film Type 55 (ASA 55 [Pos/Neg])
Polaroid Land Film Type 51 (ASA 640 (Pos), ASA 80 (Neg) [HC Pos/Neg])
Polaroid Land Film Type 52 (ASA 400, [PolaPan])
any type of 4x5 sheet film (with appropriate film holder)
Exposure Factor: 20 (i.e. divide ASA of film in use by 20, so Type 57 becomes ASA 150, effectively)
Film Holder: extra (Polaroid Sheet or 4x5 cut-film holder)
Relay Lens Cap: not included (film has built-in cap)

This is the most versatile of all the Speed Magnys, as it allows the film holder to be swapped between the standard Polaroid 4x5 sheet film holder (familiar to most of us who've done microscope photography) and the even more familiar 4x5 cut-film holders (e.g. those from Speed Graphics -- but I'm not sure if it will accept a Grafmatic holder).

Speed Magny RF

Overall Length: 178mm (7 in.)
Width: 318mm (12.5 in.)
Height (from prism to bottom): 254mm (10 in.)
Weight: 2 090g (4.8 lb.)
Film Format: 3.25 x 4.25 in., roll-film
Magnifiying Relay Lens: EL-Nikkor 50mm f/2.8
Magnification Ratio: 3.2:1 (i.e. multiply 35mm focal length by 3.2)
Films to be Used:
Polaroid Land Film Type 42 (ASA 200 [PolaPan])
Polaroid Land Film Type 47 (ASA 3 000)
Polaroid Land Film Type 48 (appox. ASA 75 [Polacolor])
Polaroid Land Film Type 410 (ASA 10 000)
Polaroid Land Film Type 46-L (ASA 800 [Coninuous-Tone Transparency Film])
Polaroid Land Film Type 146-L (ASA 800 [Line Copy Transparency Film] -- sensitive to blue only)
All films now appear to be discontinued
Exposure Factor: 18 (i.e. divide ASA of film in use by 18)
Film Holder: Polaroid CB40 Land roll-film adapter
Relay Lens Cap: included, acts as darkslide

This Speed Magny is supplied with a relay lens cap, which caps the EL-Nikkor and allows the Speed Magny to be removed without fogging the remaining film. Rotate the knob clockwise so that the "C" mark lines up with the white dot on the body of the Speed Magny. Earlier models do not have this capping feature.

This is probably not a great Speed Magny to use -- a quick browse through the Polaroid website makes me think that all film in this format has been discontinued. I suppose that you could probably adapt 120/220 to this back, but if you want to run medium format with Nikkor lenses, the Bronica focal-plane SLRs are a much more elegant solution ...

| Next | Long Roll Back for Nikon F

Main Reference map in HTML & PDF:
Body with FTN Finder | FTN finder | camera body |
External links for F & F2

logo.gif (3k)* Message Board for Nikon F

| Back | to Nikon-F - Main Index Page

Other Nikon F Variations

| Message Board | for Nikon F Series SLR Camera(s)
| Message Board | for your Nikon Optics in a shared environment
| Message Board | Specifically for Dispose or Looking for Nikon/Nikkor Photographic Equipment

The Eyes of Nikon:-
Nippon Kogaku KK Rangefinder RF-Nikkor lenses:- Main Index Page
Nikon Auto Focus Nikkor lenses:- Main Index Page
Nikon Manual Focus Nikkor lenses- Main Index Page
Fisheye-Nikkor Lenses - Circular | Full Frame | Ultrawides Lenses - 13mm15mm18mm20mm | Wideangle Lenses - 24mm28mm35mm |
Standard
Lenses -
45mm 50mm 58mm | Telephoto Lenses - 85mm105mm135mm180mm & 200mm |
Super-Telephoto
Lenses - 300mm 400mm 500mm 600mm 800mm 1200mm |
Special Application lenses:
Micro-Nikkor Lenses - 50mm~55mm -60mm 85mm -105mm 200mm Micro-Zoom 70-180mm
Perspective Control (PC) - 28mm 35mm PC-Micro 85mm
Dedicated Lenses for Nikon F3AF: AF 80mm f/2.8 | AF 200mm f/3.5 EDIF
Depth of Field Control (DC): 105mm 135mm
Medical Nikkor: 120mm 200mm
Reflex-Nikkor Lenses - 500mm 1000mm 2000mm
Others: Noct Nikkor | OP-Nikkor | UV Nikkor 55mm 105mm | Focusing Units | Bellows-Nikkor 105mm 135mm
Nikon Series E Lenses: 28mm35mm50mm100mm135mm | E-Series Zoom lenses: 36~72mm75~150mm70~210mm
MF Zoom-Nikkor Lenses: 25~50mm | 28~45mm | 28~50mm | 28~85mm | 35~70mm | 36~72mm E | 35~85mm | 35~105mm | 35~135mm |
35~200mm | 43~86mm | 50~135mm | 50~300mm | 70~210mm E | 75~150mm E | 80~200mm | 85~250mm |
100~300mm | 180~600mm | 200~400mm | 200~600mm | 360~1200mm | 1200~1700mm

Tele-Converters: TC-1 | TC-2 | TC-200 | TC-201 | TC-300 | TC-301 | TC-14 | TC-14A | TC-14B | TC-14C | TC-14E | TC-16 | TC-16A | TC-20E

weblibrary.gif

Nikon F
| Nikon F2 | Nikon F3 | Nikon F4 | Nikon F5 | Nikon F6 | Nikkormat / Nikomat |
Nikon FM
| Nikon FE/ FA | Nikon EM/FG/FG20 | Nikon Digital SLRs | Nikon - Other models

MIR Supports for Photographic Community: Various Message Boards/Community Forums
Nikon F-series| Nikon F2-series| Nikon F3-series| Nikon F4-series| Nikon F5-series|Nikkormat/Nikomat-series
Nikon FM-series
|Nikon FE-series|Nikon FA|Nikon Digital SLR series|Various Nikon Models|Nikkor Optic -shared

Others:- Free Trade Zone - Photography| Free Trade Zone - Business Community |Free To Zouk - Photographic Community
Apple's
Mac Public Community Message Board | Windows based PC & Apple/Mac Public Community Trade Exchange Centre

Recommended links to understand more technical details related to the Nikkor F-mount and production Serial Number:
http://rick_oleson.tripod.com/index-153.html by: my friend, Rick Oleson
http://www.zi.ku.dk/personal/lhhansen/photo/fmount.htm by: Hansen, Lars Holst
http://www.mir.com.my/rb/photography/hardwares/nikonfmount/lens2.htm
http://www.photosynthesis.co.nz/nikon/serialno.html

Modern Classic SLRs Series :
Nikon F - Index Page

name.gifHOME
Copyright © 1998. Michael C. Liu ®

Site rearranged by: leofoo ®. Credit: Hiura Shinsaku® from Nikomat Club of Japan for feeding some useful inputs on the introductory page. The great 3D logo by Kiasu; Ted Wengelaar®, Holland for his continuous flow of input of early Nikon bodies. Stephen Gandy's Cameraquest; Marc Vorgers from Holland for his additinal images on Nikon F Apollo; Hayao Tanabe corrected my Red Dot and Early F assertions. Gray Levett, Grays of Westminster publishes an excellent monthly historical look at Nikon products, from where I learned about the high-speed F's. Made with a PowerMac, broadcast with a Redhat Linux powered server.

MIR Logo.gif
Home - Photography in Malaysia
Search.gif