Solar and Hg lamp spectrum lens test - Olympus M.Zuiko Digital 30mm f3.5 Macro

[Dmitry]

Gear used:

Olympus e-m5 body full spectrum converted myself.

Olympus 30mm f3.5 Macro

 

processed in xnview from ORF without white balance changes, all filters 2mm

 

no filters

 

zwb1

 

zwb3

 

Lines reference in index sticky - lines

Left orange line is 365nm

 

no filters

 

zwb3

 

Left Hg line 365nm is visible, solar spectra starting from about 360nm is visible

[dabateman]

Yes the Olympus 30mm Macro lens is good.

But not as good as the Sigma 30mm f2.8 lens.

My rank of capable m43rds lens in order of most 365nm transmission:

1. Canon 40mm f2.8 STM lens with pass through adapter.

2. Sigma 30mm f2.8 lens art lens with smooth focus ring.

3. Olympus 30mm f3.5 macro lens.

4. Olympus 14-42mm f3.5/f5.6 R2 kit lens.

 

These all allow for autofocus and in camera focus stacking with firmware hack.

 

The Olympus 43rds 35mm f3.5 macro lens is better than the Olympus 30mm Macro lens, but can't be used for in camera automatic focus stacking with the hack.

 

The best pass through EF mount adapter is the expensive Metabones BT2 one. Its the only one that allows for in camera automatic focus stacking with the hack firmware.

[Dmitry]

My copy of Sigma 30mm f2.8 is faulty and I see no huge difference in spectra.

[dabateman]

My copy of Sigma 30mm f2.8 is faulty and I see no huge difference in spectra.

 

Take a picture of a flower with them. The Sigma will require less exposure time than the Olympus.

[Cadmium]

Nice gratings!