Look for a body with a Copal shutter or Seiko Metal Focal-Plane Compact... these use metal vertical travel focal plane curtains.
"
Square-type metal-bladed focal-plane shutter[edit]
In 1960, the
Konica F (Japan) 35 mm SLR began a long term incremental increase in maximum shutter speeds with its "High Synchro" FP shutter.
[52] This shutter greatly improved efficiency over the typical Leica shutter by using stronger metal blade sheaves that were "fanned" much faster, vertically along the minor axis of the 24×36 mm frame. As perfected in 1965 by Copal, the
Copal Square's slit traversed the 24 mm high film gate in 7 ms
[53] (3.4 m/s). This doubled flash X-sync speed to 1/125 s. In addition, a minimum 1.7 mm wide slit would double top shutter speed to a maximum 1/2000 s. Note, most Squares were derated to 1/1000 s in the interest of reliability.
[54]
The Square's metal blades were also immune to the drying out, rotting and pinholing that cloth curtained shutters could suffer from as they aged.
[55][56] In addition, Squares came from the supplier as complete drop-in modules, so camera designers could concentrate on camera design and leave shutter design to specialist subcontractors. This had previously been an advantage of leaf shutters.
[57]
Square-type FP shutters were originally bulky in size and noisy in operation, limiting their popularity in the 1960s among camera designers and photographers.
[22] Although
Konica and
Nikkormat (edit: and
Topcon D-1) were major users of the Copal Square, many other brands including Asahi Pentax, Canon, Leica and Minolta continued to refine the Leica-type shutter for reliability, if not speed; moving from three axis to four axis designs (one control axis for each curtain drum axis, instead of one control for both drums).
[58]
New compact and quieter Square designs, with simpler construction and greater reliability, were introduced in the 1970s.
[59] The most notable were the
Copal Compact Shutter (CCS), introduced by the
Konica Autoreflex TC (1976),
[60] and the
Seiko Metal Focal-Plane Compact (MFC), first used in the
Pentax ME (1977; all from Japan).
[61] The vertical blade type supplanted the horizontal cloth type as the dominant FP shutter type in the 1980s. Even Leica Camera (originally E. Leitz), long a champion of the horizontal cloth FP shutter for its quietness, switched to a vertical metal FP shutter in 2006 for its first digital
rangefinder (RF) camera, the Leica M8 (Germany).
[62]
Note that the
Contax (Germany) 35 mm RF camera of 1932 had a vertical travel FP shutter with dual brass-slatted roller blinds with adjustable spring tension and slit width, and a top speed of 1/1000 s (the
Contax II of 1936 had a claimed 1/1250 s top speed), but it was woefully unreliable and not an antecedent of the modern Square shutter.
[63][64]
Quest for higher speed[edit]
Although the Square shutter improved the FP shutter in most ways, it still limited maximum flash X-sync speed to 1/125 s (unless using special long-burn FP
flash bulbs that burn throughout the slit wipe, making slit width irrelevant.
[65][66]). Any quality
leaf shutter of the 1960s could achieve at least 1/500 s flash sync. Greater FP shutter X-sync speed would require further strengthening the curtains, by using exotic materials, allowing them to move even faster and widen the slits.
Copal collaborated with Nippon Kogaku to improve the
Compact Square shutter for the
Nikon FM2 (Japan) of 1982 by using honeycomb pattern etched titanium foil, stronger and lighter than plain stainless steel, for its blade sheaves. This permitted cutting shutter-curtain travel time by nearly half to 3.6 ms (at 6.7 m/s) and allowed 1/200 s flash X-sync speed. A bonus was a distortionless top speed of 1/4000 s (with 1.7 mm slit).
[67] The
Nikon FE2 (Japan), with an improved version of this shutter, had a 3.3 ms (at 7.3 m/s) curtain travel time and boosted X-sync speed to 1/250 s in 1983. The top speed remained 1/4000 s (with 1.8 mm slit).
[68]
The fastest focal-plane shutter ever used in a film camera was the 1.8 ms curtain travel time (at 13.3 m/s)
duralumin and carbon fiber bladed one introduced by the
Minolta Maxxum 9xi (named Dynax 9xi in Europe, α-9xi in Japan) in 1992. It provided a maximum 1/12,000 s (with 1.1 mm slit) and 1/300 s X-sync.
[69] A further improved version of this shutter, spec'ed for 100.000 actuations, was used in the
Minolta Maxxum 9 [
de] (named Dynax 9 in Europe, α-9 in Japan) in 1998 and
Minolta Maxxum 9Ti (named Dynax 9Ti in Europe, α-9Ti in Japan) in 1999.
[70]"
IIRC, all of the above cameras -- except for the Nikon FE2 and the Minoltas mentioned in the last paragraph -- were mechanical cameras and not electronically controlled