The most common application of Vlads Test Target is to use it as a strip. The strip of film is placed in the film holder and then all tuning operations are performed. The length of the strip is mostly dictated by the length of film path in the holder. Say Valoi 135 or vintage Nikon PB4 have short film path and three-frame strip works just fine. Negative Supply's Basic Carrier, Lomography Digitaliza+ require five frame strips -just to place middle frame in the center of the carrier.   

GP7011 - One frame of Adox CMS 20 film is mounted in the glassless slide mount GEPE 7011 with metal mask for extra sharp borders and enhanced flatness. 

Note, by design the film is not protected by the glass covers from the either side. The slide thickness is 2 mm. 

The actual opening is 23x35 mm.

GP6013 - One frame of Adox CMS film with USAF 1951 targets is mounted in very rare GEPE Art. 6013 FULL SIZE Anti-Newton double glass frame. The frame opening is full 24x36(!) mm (vs usual 23x35 mm). That allows to check and tune up scanning rig to capture the complete image as it was captured in the gate of film camera itself.

The actual opening is 24x36 mm.

GP6001 -  One frame of Adox CMS film is mounted in double glass slide binders GEPE 6001 with metal mask. The film is protected by regular thin glass (not ANR) , but because of the metal mask, the film does not touch glass, so there is no danger of Newton rings to appear. 

The actual opening is 23x35 mm.

This mount provides excellent protection for the transparency. Silver mask and tape were supposed to reflect the heat from the powerful lamps used for projection - back 60 years ago. The mount provide excellent flatness of the film original.

This mount provides excellent protection for the transparency. Silver mask and tape were supposed to reflect the heat from the powerful lamps used for projection - back 60 years ago.  The mount provide excellent flatness of the film original. There cut-outs at the corners for the paper mask to expose frame's corners for better framing - complete 24x36 mm area is exposed.

This mount provides excellent protection for the transparency.  Silver aluminum  mount provides for very good structural integrity of the slide. 

This offering is based on GEPE Art. 6901 with AN glass covers. The mounts have standard 50x50mm form-factor.

The actual opening is 37.5 x 37.5 mm, which is  big enough to have a specially developed transparency  with full 24x36 mm area precisely delineated. There are also extra marks showing 23x35 mm and 21x33 mm areas. Before you start scanning 35 mm mounted slides, you place the test slide in your slide holder and carefully adjust the camera to have either 24x36 or 23x35 mm area in the center of the viewfinder knowing exactly what your camera can see. The extremely uniform dot pattern with extremely high edge contrast helps you with the precise focusing and provides you with visual cue as to the uniformity of the backing light. 

The strip is comprised of six frames: first and last are empty and used to hold and advance the strip.

Frames two and three are handy to checking focus across the board. Frame three has the thin greed handy if you want assess the lens'  barrel distortion or pincushion distortions at 1:1 magnification. Frame four can be used to assess the uniformity of light and compare sharpness across the frame. Postives and  Negatives are available.

Two frames per strip : 6x9 ( 56x84 mm) and 6x6  (56x56mm internal size) 

Two frames per strip : 6x9 ( 56x84 mm) and 6x6  (56x56mm internal size) . 6x9 frame has ISO 12233 pattern, 6x6 has regular set of USAF 1951 patterns.