Leica TL2: Crop Factor, NPF Rule & Hyperfocal Chart

Name: Leica TL2
Brand: Leica

The Leica TL2 uses the Leica L mount with a 1.53× crop factor (about 23.5 × 15.7 mm sensor). Below: equivalent focal lengths, maximum shutter speeds for sharp stars, a hyperfocal distance chart, compatible lenses and how to check the shutter count.

Mount

Leica L

Crop factor

1.53×

Sensor (approx.)

23.5 × 15.7 mm

Circle of confusion

0.0196 mm

Equivalent focal length & field of view

Lens focal length	Full-frame equivalent	Diagonal FOV	Horizontal FOV
8 mm	12 mm	121.0°	111.5°
10 mm	15 mm	109.4°	99.2°
12 mm	18 mm	99.3°	88.8°
14 mm	21 mm	90.5°	80.0°
16 mm	24 mm	82.9°	72.6°
18 mm	28 mm	76.3°	66.3°
20 mm	31 mm	70.5°	60.9°
24 mm	37 mm	61.0°	52.2°
28 mm	43 mm	53.6°	45.5°
35 mm	54 mm	44.0°	37.1°
50 mm	76 mm	31.6°	26.4°
85 mm	130 mm	18.9°	15.7°
135 mm	207 mm	12.0°	9.9°
200 mm	306 mm	8.1°	6.7°
300 mm	459 mm	5.4°	4.5°
400 mm	612 mm	4.0°	3.4°

Multiply by the 1.53× crop factor for the full-frame equivalent field of view.

Milky Way exposure: NPF and 500 rule

Focal length	NPF @ f/1.8	NPF @ f/2.8	Strict NPF @ f/2.8	500 rule
8 mm	22.5 s	26.9 s	14.5 s	40.8 s
10 mm	18.0 s	21.5 s	11.6 s	32.7 s
12 mm	15.0 s	17.9 s	9.7 s	27.2 s
14 mm	12.9 s	15.4 s	8.3 s	23.3 s
16 mm	11.2 s	13.4 s	7.3 s	20.4 s
18 mm	10.0 s	11.9 s	6.5 s	18.2 s
20 mm	9.0 s	10.8 s	5.9 s	16.3 s
24 mm	7.5 s	9.0 s	4.9 s	13.6 s
28 mm	6.4 s	7.7 s	4.2 s	11.7 s
35 mm	5.1 s	6.1 s	3.4 s	9.3 s

NPF = (35 × f-number + 30 × pixel pitch) ÷ focal length, with a pixel pitch of 3.9 µm (typical for this format — exact resolution not in our database). The strict version (Michaud's detailed NPF for the galactic core) gives pin-point stars at 100% view; the 500 rule is a loose rule of thumb that shows trailing on modern sensors.

Hyperfocal distance chart

Focal length	f/2.8	f/5.6	f/8	f/11	f/16
10 mm	1.8 m	0.9 m	0.6 m	0.5 m	0.3 m
14 mm	3.6 m	1.8 m	1.3 m	0.9 m	0.6 m
16 mm	4.7 m	2.3 m	1.6 m	1.2 m	0.8 m
18 mm	5.9 m	3.0 m	2.1 m	1.5 m	1.1 m
20 mm	7.3 m	3.7 m	2.6 m	1.9 m	1.3 m
24 mm	11 m	5.3 m	3.7 m	2.7 m	1.9 m
28 mm	14 m	7.2 m	5.0 m	3.7 m	2.5 m
35 mm	22 m	11 m	7.8 m	5.7 m	3.9 m
50 mm	46 m	23 m	16 m	12 m	8.0 m

Focus at the hyperfocal distance and everything from half that distance to infinity is acceptably sharp (circle of confusion 0.0196 mm). Use the hyperfocal calculator for other settings.

Compatible lenses (64 in our database)

Lens	Focal length	Max aperture	Mount
Venus Laowa 9mm f/2.8 Zero-D	9 mm	f/2.8	Fujifilm X, Sony E
Venus Laowa 9mm f/5.6 FF RL	9 mm	f/5.6	Nikon Z, Sony E
Sigma 10-18mm F2.8 DC DN \| Contemporary 023	10–18 mm	f/2.8	Sony E, Fujifilm X
Venus Laowa 10mm f/2.8 Zero-D FF	10 mm	f/2.8	Sony E, Nikon Z
AstrHori 10mm f/8	10 mm	f/8	Fujifilm X, Sony E
Panasonic Lumix S 14-28mm f/4-5.6 Macro	14–28 mm	f/4	Leica L
Sigma 14-24mm F2.8 DG DN \| Art 019	14–24 mm	f/2.8	Sony E, Leica L
Venus Laowa 15mm f/2.0 Zero-D	15 mm	f/2	Canon RF, Leica L
Panasonic Lumix S Pro 16-35mm f/4	16–35 mm	f/4	Leica L
Sigma 16mm f/1.4 DC DN Contemporary	16 mm	f/1.4	Micro 4/3 System, Sony E
Sigma 16-28mm F2.8 DG DN \| Contemporary 022	16–28 mm	f/2.8	Sony E, Leica L
Sigma 16-300mm F3.5-6.7 DC OS \| C	16–300 mm	f/3.5	Fujifilm X, Canon RF
Viltrox AF 16mm F1.8 FE/L/Z	16 mm	f/16	Sony E, Leica L
Sigma 17mm F4 DG DN \| Contemporary 023	17 mm	f/4	Leica L, Sony E
Panasonic Lumix S 18-40mm f/4.5-6.3	18–40 mm	f/4.5	Leica L
Sigma 18-50mm F2.8 DC DN \| Contemporary 021	18–50 mm	f/2.8	Sony E, Leica L
7Artisans 18mm f/5.6 Full Frame	18 mm	f/5.6	Leica L, Nikon Z
7Artisans 18mm f/6.3 II	18 mm	f/6.3	Fujifilm X, Sony E
Panasonic Lumix S 20-60mm f/3.5-5.6	20–60 mm	f/3.5	Leica L
Sigma 20mm F2 DG DN \| Contemporary 022	20 mm	f/2	Sony E, Leica L
Sigma 20-200mm F3.5-6.3 DG \| Contemporary	20–200 mm	f/3.5	Sony E, Leica L
TTArtisan APS-C 23mm F1.4	23 mm	f/1.4	Sony E, Fujifilm X
Viltrox AF 23mm F1.4 XF/Z/L	23 mm	f/23	Fujifilm X, Nikon Z
Panasonic Lumix S 24mm f/1.8	24 mm	f/1.8	Leica L
Panasonic Lumix S 24-60mm f/2.8	24–60 mm	f/2.8	Leica L
Panasonic Lumix S 24-105mm f/4 Macro OIS	24–105 mm	f/4	Leica L
Sigma 24mm F2 DG DN \| Contemporary 021	24 mm	f/2	Sony E, Leica L
Sigma 24-70mm F2.8 DG DN \| Art 019	24–70 mm	f/2.8	Sony E, Leica L
Sigma 24-70mm F2.8 DG DN II \| Art 024	24–70 mm	f/2.8	Leica L, Sony E
Sigma 24mm F3.5 DG DN \| Contemporary 021	24 mm	f/3.5	Leica L, Sony E
Sigma 24mm f/1.4 DG HSM \| A	24 mm	f/1.4	Nikon F AF, Sigma SA
TTArtisan APS-C 25mm f/2.0	25 mm	f/2	Sony E, Fujifilm X
Sigma 28-70mm F2.8 DG DN \| Contemporary 021	28–70 mm	f/2.8	Sony E, Leica L
Sigma 28mm F1.4 DG HSM \| Art	28 mm	f/1.4	Nikon F AF, Leica L
Voigtländer Nokton 28mm F1.5 Aspherical	28 mm	f/1.5	Sony E, Nikon Z
Sigma 30mm f/1.4 DC DN	30 mm	f/1.4	Sony E, Micro 4/3 System
Panasonic Lumix S 35mm f/1.8	35 mm	f/1.8	Leica L
Sigma 35mm F2 DG DN \| Contemporary 020	35 mm	f/2	Sony E, Leica L
Meike AF 35mm F2 FF	35 mm	f/35	Leica L, Sony E
Meike SL 35mm F1.8 STM PRO	35 mm	f/1.8	Leica L, Sony E

Native and adapter-free compatible lenses from the Lensfun database. Third-party and adapted lenses may also work.

How to check the Leica TL2 shutter count

Some Leica M and SL bodies show the count in the camera's service or info menu; EXIF support varies by model.

ExifTool tag: (varies). Always test an original, unedited file straight from the card.

Where to buy

Compare new and used prices at these retailers:

B&H Photo Amazon KEH (used)MPB (used)

Other Leica L cameras

FAQ

What is the crop factor of the Leica TL2?

1.53×. A 24 mm lens frames like a 37 mm lens on full frame.

What shutter speed should I use for the Milky Way with the Leica TL2?

With a 8 mm lens at f/2.8, about 27 seconds keeps stars sharp (NPF rule).

How do I check the shutter count on the Leica TL2?

Some Leica M and SL bodies show the count in the camera's service or info menu; EXIF support varies by model.

Which lenses fit the Leica TL2?

Lenses for the Leica L mount and compatible mounts (Leica M) — 64 are listed above.