C41
Kodak Portra 400
Kodak Portra 400 is a professional C-41 color negative film known for flexible exposure latitude, natural skin tones, and fine grain.
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The Cosina CS-1 (1980) is the entry-level mechanical SLR built by Cosina (Japan). Cosina was the OEM supplier of budget SLRs to dozens of brands through the 80s — the same mechanical body was sold as **Vivitar V3000, Ricoh KR-5, Nikon FM10, Voigtländer-revived bodies**, etc. Polycarbonate-on-aluminum body, mechanical horizontal-cloth shutter to 1/1000s, TTL CdS metering, Pentax K mount.
Reference
Recommended film stocks for the 35mm format your camera takes.
C41
Kodak Portra 400 is a professional C-41 color negative film known for flexible exposure latitude, natural skin tones, and fine grain.
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Kodak Tri-X 400 is a classic black-and-white film known for strong tonality, visible grain, and documentary character.
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Kodak Gold 200 is a daylight-balanced C-41 color negative film with warm color, moderate grain, and a classic consumer-film look.
Develop 35mm film
Labs in our directory that process 35mm film.
Before you buy used
About this camera
Cosina's house-brand SLR. Same body sold under dozens of brand names — the OEM body of the 1980s budget SLR era.
| Field | Value |
|---|
| Format | 35mm |
| Mount | Pentax K |
| Years | 1980–1990 |
| Shutter | 1s – 1/1000s, mechanical horizontal cloth |
| Flash sync | 1/60s |
| Meter | TTL center-weighted CdS |
| Modes | Manual |
| Weight | 480 g |
| Battery | 2× SR44 (meter only) |
Cosina launched the CS-1 around 1980 as a house-brand body. The same chassis was rebadged extensively for OEM customers. Production continued through the 80s in various branded variants. Cosina later (1999) revived the Voigtländer brand for their own M-mount rangefinders (Bessa series).
For 2026 buyers, the Cosina CS-1 (or its many rebadged variants) is the cheapest mechanical Pentax K-mount SLR you can buy. Used at $60–150. The mechanical operation, full K-mount lens compatibility, and simple design make it bulletproof for student photography.
Pentax K-mount: any era.
BW
Ilford HP5 Plus is a flexible ISO 400 black-and-white film with classic grain and strong push-processing tolerance.
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Kodak Ektar 100 is a fine-grain C-41 color negative film with saturated color and high sharpness.
View profile →Cosina CS-1
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