• Ultraviolet Photography
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Solar spectrum lens test - Meike 28mm f2.8

6 replies to this topic

#1 Dmitry

    Dmitry K.

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Posted 01 July 2018 - 12:27

Gear used:
Olympus e-pm1 body full spectrum converted myself.
Meike 28mm f2.8 lens. AKA Kaxinda/Neewer
More details in the index topic.

Full spectrum, no filter
Attached Image: P7019077.jpg

zwb1
Attached Image: P7019078.jpg

zwb1+qb21
Attached Image: P7019079.jpg

zwb2
Attached Image: P7019080.jpg

zwb2+qb21
Attached Image: P7019081.jpg

zwb3
Attached Image: P7019082.jpg

zwb3+qb21
Attached Image: P7019083.jpg

#2 Dmitry

    Dmitry K.

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Posted 08 July 2018 - 21:30

Real photo test to check UV focus shift, not touched focus point:

zwb3 - most is IR
Attached Image: P7089101.JPG

zwb3+qb21 - most is VIS
Attached Image: P7089102e.jpg

zwb2+qb21 - most is UV
Attached Image: P7089103e.jpg

#3 Dmitry

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Posted 08 July 2018 - 21:41

Just in case someone want location
https://goo.gl/maps/6tdF1PQWGvE2

#4 Andrea B.

    Desert Dancer

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Posted 09 July 2018 - 18:19

Thanks for the location. That was fun to see! :D
Andrea G. Blum
Often found hanging out with flowers & bees.

#5 Dmitry

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Posted 09 July 2018 - 18:37

Did some testing with filters and focusing. zwb2 and zwb1 filters have different focusing distances.
Object at infinity:
IR and vis - infinity mark
zwb2+qb21 - 2 meters mark
zwb1+qb21 - 1.6 meters mark

#6 Dmitry

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Posted 09 July 2018 - 18:41

Forgot to add - I polished some internal parts of the body e-pm1 to move the sensor and get the correct infinity.

#7 Dmitry

    Dmitry K.

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Posted 11 August 2018 - 12:53

One more test

no filter
Attached Image: P8119205.jpg

zwb3+qb21
Attached Image: P8119206.jpg

unknown 315nm
Attached Image: P8119207.jpg

unknown 315nm +qb21
Attached Image: P8119208.jpg