Alpa 11si

Introduction: The Alpa 11si at a Glance

The Alpa 11si is a Swiss 35mm single-lens reflex that belongs to the Alpa 11 series, the last evolution of the 35mm SLRs made by Alpa. If you are exploring SLR film cameras or the wider world of analog cameras, the 11si is one of the more unusual and craftsmanship-driven designs you can come across. The brochure presents Alpa as the last maker of European 35mm SLRs.

In practice the 11si is, apart from its electronic exposure measurement, essentially the same camera as the Alpa 11el in every aspect, including handling. It combines through-the-lens metering, a short flange distance and a system of macro accessories in a hand-built body.

Shooting a hand-built mechanical SLR like this tends to slow you down. Setting the speed, focusing and releasing the shutter become separate, deliberate steps, which changes how many photographers compose a frame.

Design Roots and Historical Background

The last of the Alpa 35mm SLRs

According to camera-wiki, the Alpa 11e and its successors were the final evolution of the 35mm SLR series from Alpa. The 11e launched in 1971, and successor models continued into the 1980s. The 11si sits within this later family of the 11-series.

The brochure describes the camera body as hand assembled from start to finish by skilled craftsmen, using die-cast aluminium. Few cameras of this kind are still built that way.

From CdS cells to silicon photodiodes

The defining change in the 11si is the meter. The CdS meter cells of earlier models were replaced with improved silicon photodiodes. Apart from this electronic exposure measurement system, the 11si is in every aspect similar to the 11el.

The standard lens is the Kern Macro-Switar 1.9/50 mm, which has 8 elements in 5 groups. Used on the 11si, it focuses down to 1:3 without any accessories.

Key Technical Highlights

Format, shutter and flash

The Alpa 11 el is described as a 35 mm single-lens reflex with a through-the-lens light matching meter, and the 11si follows it in operation. The documentation lists picture formats of 24x36 mm, 18x24 mm or 17x22.5 mm. Shutter speeds run from B and 1 second through the standard series up to 1/1000 second.

Electronic flash synchronises at 1/60 second. That speed is marked in red on the speed ring because it is the fastest speed that works with electronic flash.

Short flange distance and lens choice

Alpa states that, of all reflex cameras, it has the shortest back focus, meaning the distance between the film plane and the lens panel: 37.8 mm. With adapter rings, many lenses fit. Always confirm the adapter and lens combination before you buy.

Power and mirror

The meter is powered by a 6 V silver oxide battery, listed as PX 28 or Everready 544. The circuit closes only while the shutter release is pressed. The mirror can also be raised manually to eliminate vibration, a feature that helps in macro and telephoto photography.

• Type: 35mm single-lens reflex with through-the-lens metering
• Meter: silicon photodiodes
• Shutter speeds: B, 1 s to 1/1000 s
• Flash sync: 1/60 s for electronic flash
• Flange distance: 37.8 mm
• Battery: 6 V silver oxide (PX 28 / Everready 544)

Modern-Day Use in 2026

Where the 11si excels

In 2026 the Alpa 11si is a camera for photographers who enjoy deliberate, manual shooting and the feel of precision hardware. The brochure notes that the manual mirror lift is useful for macro and telephoto work, and the system includes extension tubes, bellows and reversing rings for close-up photography.

Use it for:

• Close-up and macro work with tubes, bellows or reversing rings.
• Slow, considered portraits and still life.
• Telephoto shots where mirror vibration matters.

Practical shooting tips

• Use a tripod for macro work and raise the mirror manually to avoid vibration.
• Bracket exposures at first while you learn how the meter behaves.
• Keep electronic flash at 1/60 s, the speed marked in red.

Buying and Maintenance Guide

What to check before buying used

Work through this checklist:

• Light seals and mirror area: look for crumbling foam or sticky residue.
• Shutter: test every speed from B and 1 s to 1/1000 s and listen for irregular timing.
• Meter: install a fresh battery and check that the needle or indicator responds to changes in light.
• Viewfinder and lens: look for haze, fungus, dust or scratches in the finder and the glass.
• Mirror: confirm it returns properly and that the manual mirror lift works.

If you plan to use tubes or a bellows, check that they mount correctly.

Power and batteries

The meter needs a 6 V silver oxide battery (PX 28 / Everready 544), and the circuit is only closed while the shutter release is pressed. The meter will not work without a suitable battery.

• Check the battery compartment for corrosion or residue before inserting a cell.
• Remove the battery if you store the camera for a long time.
• Carry a spare, since a flat cell leaves you without metering.

Basic care and accessories

A few simple photography accessories go a long way:

• A padded bag or case to protect the body and lens.
• A blower and microfiber cloth for safe cleaning of glass.
• A sturdy tripod for macro and low-light work.

Conclusion: A Swiss Craft Object You Can Still Shoot

The Alpa 11si combines a hand-assembled aluminium body, silicon photodiode metering and one of the shortest flange distances of any reflex camera. The macro system and manual mirror lift give it a clear purpose in use.

If you want an SLR with real character and are happy to check every function before you buy, the 11si is a fascinating option. With a fresh battery and fresh film, it can still make rewarding images in 2026.

Ready to explore cameras like the Alpa 11si? Browse our selection of analog cameras and SLR film cameras, and add the right photography accessories at DutchThrift.com.

Sources: the Alpa 11el instruction manual with 11si supplement and the Alpa 11si brochure (both available as PDF); Alpa 11 series on camera-wiki.org, text licensed under GFDL 1.3.