Pentax smc DA* 300mm F4.0 ED (IF) SDM vs Tamron SP 300mm f/2.8 LD IF Adaptall-2
Side-by-side comparison from our catalogue data. Better values are highlighted only where a clear difference exists.
Verdict at a glance
- Tamron SP 300mm f/2.8 LD IF Adaptall-2 is faster by 1 stop (f/2.8 vs f/4.0), letting in more light.
| Spec | smc DA* 300mm F4.0 ED (IF) SDM | SP 300mm f/2.8 LD IF Adaptall-2 |
|---|---|---|
| Brand | Pentax | Tamron |
| Mount | Pentax K | Pentax K |
| Type | Prime | Telephoto |
| Focal length | 300mm | 300mm |
| Max aperture | f/4.0 | f/2.8 (faster) |
| Format | aps-c | full-frame |
| Weight g | 1070 | n/a |
| Filter mm | 77 | n/a |
| Length mm | 184.0 | n/a |
| Diameter mm | 83.0 | n/a |
| Min focus m | 1.4 (closer focusing) | 3.0 |
| Groups | n/a | 6 |
| Af motor | n/a | none |
| Elements | n/a | 7 |
Pentax smc DA* 300mm F4.0 ED (IF) SDM
A 300mm f/4 telephoto prime for Pentax APS-C bodies with SDM focusing. It weighs about 1,070 g and takes 77mm filters.
Pros
- f/4 at 300mm
- SDM autofocus
- Star-series build
- Close focus 1.4 m
Cons
- APS-C only
- Heavy
- No lens stabilization
Tamron SP 300mm f/2.8 LD IF Adaptall-2
The Tamron SP 300mm f/2.8 LD IF Adaptall-2 is a telephoto prime lens covering 300mm at f/2.8 for Pentax K mount cameras, from the Tamron SP series. It brings distant subjects closer for sports, wildlife and events.