Mike's journal

Objectives, Tube Lenses, Polarizers, etc

This page documents my plan and tests for objectives, tube lens, filters, etc.  As well as my observations regarding Pixel Shift. Objectives Tube Lenses Condenser Collimeter Polarizers Retardation Plates Tubes Pixel Shift

Objectives

Here are the objectives that  I own  and that  I want .  And things that  I like  and that  I don't like .  All are Infinity Corrected; Plan Achromat (Mitutoyo), Plan (Nikon, AmScope 40X & 60X, Olympus) or Plan Fluor (Amscope 4X); no coverglass (∞/0 or ∞/-); dry (not oil).
 
 

Mag.	H a v e	Mitutoyo				Nikon				AmScope				Olympus			OMAX			Leitz			Canon			Sony
		NA	Feff	WD	Price	NA	Feff	WD	Price	NA	Feff	WD	Price	NA	WD	Price	NA	WD	Price	NA	WD	Price	Len	WD	Price	Len	WD	Price
1X	3																						100	300	$750	90	280	$1000
																							180	240	$1400
2X	0	0.055	18	34.0	$935	0.06	17	7.5	$417
4X	2					0.10	20	30	$183					0.10	18.5	$140
										0.13	8	?	$69			$49
5X	0	0.14	18	34.0	$705
		0.21	12	25.4	$4,750
10X	2	0.28	18	33.5	$885	0.25	20	10.5	$279	0.35	14	?	$162	0.25	10.6	$315
		0.42	12	15.0	$8,125
20X	1	0.28	36	30.5	$3,095
		0.42	24	20.0	$2,055									0.40	1.2	$375
32X	0																			0.50	?	$79
40X	1					0.65	31	0.57	$490	0.65	31	?	$88	0.65	0.6	$575	0.60	2.8	$197
50X	0	0.42	60	20.5	$3,425
		0.55	45	13.0	$2,675
		0.75	33	5.2	$5,725	0.80	31	1.0	$1,645					0.80	1.0	$300
60X	1									0.85	35	?	$125
80X	1													0.90	0.20	$77
100X	0	0.55	91	13.0	$4,795
		0.70	71	6.0	$3,495
		0.90	56	1.3	$6,175												0.90	0.7	$462	0.90	?	$199

Key:

I own it

I want it

I like it

I don't like it

To-do

 

Tube Lens

Here is what I have available to test for use as a tube lens.

Make and Model	Focal Length (mm)	Specified		Price
		Working Distance (mm)	Pupil Distance (mm)
Canon 100mm Macro	100	n/a	n/a	$749
Canon 180mm Macro	180	n/a	n/a	$1,399
Raynox DCR-150	208	210 (EM), 208 (SR)	50 (RO)	$62
Sony 90mm Macro	90	n/a	n/a	$998
Thorlabs ITL200	200	148 (TL), 245 (RO)	70-170 (TL), 75 (RO)	$482+$49

Source

Source

For a sanity check on the results, here is a comparison of MTFs of the Sony 90mm Macro and the Canon 100mm f/2.8L Macro.   The measurements are from Lens Rentals More PhotoGeekery: Finite Conjugate MTF Bench Tests for Macro Lenses by Roger Cicala, August 15, 2016.   I have overlayed the Canon MTF onto the Sony MTF.  Each plot shows the difference between the Sony and Canon at the various MTF values.  Where the areas are mottled show Canon besting Sony.  Solid areas show Sony besting Canon.  There is some cool symmetry, lending some confidence in the data (?)

Make, Model and Orientation	Optimum Working Distance (mm) (measured between sensor and back end of tube lens)
	Focussed on the moon (no objective used)	Focussed on an integrated circuit wafer (using the Mitutoyo 10X objective) / Pupil Distance used
Raynox DCR-150
Raynox DCR-150 Reversed
Thorlabs ITL200
Thorlabs ITL200 Reversed

Images

To-do

Condenser

Here is what I have available to test.
 

Make & Model	N/A	Aperture	Price
Nikon Abbe	1.25		$90 (w/DF & Rheinberg filters)
Olympus Abbe	1.25		$29

Nikon Condenser

Olympus Condenser

To-do

 

Collimeter

Here is what I have available to test.
 

Make & Model	Aperture	Price
Leitz		$66
Olympus		$59

Leitz Collimeter

Olympus Collimeter

To-do

 

Polarizers

Here is what I have available to test.
 

Source	Material	Extinction Ratio	Thickness (mm)	Transmission (Single)(%)	Dia (mm)	Price (each)
Edmund's	Glass	10000:1	2.00	25.0	50.8	$199
	Plastic	9000:1	2.20	36	50.8	$31
eBay	Plastic	1000:1	0.80	38	45	$7

To-do

 

Retardation Plates

Here is what I have available to test.
 

Source	Material	Retardance	Type	Transmission (%)	Dimension (mm)	Price
Edmund's	Film	λ/4	Achromatic Waveplate	>90	50.0 x 50.0	$12
		λ/2	Multiple Order Waveplate	>90	50.0 x 50.0	$12
		λ	Multiple Order Waveplate	>89	50.0 x 50.0	$18

To-do

 

Tubes

This is a calculation of what combinations of Thorlabs Adjustable Lens Tubes and Stackable Lens Tubes will give me a good range of lengths.  Read the top table left to
right.  So, an SM2L03 paired with an SM2V05 gives the range of Min Len to Max Len as noted.

Here is the combination of tubes, tube lens, filters, condenser and collimeter, light source, and 3D-printed parts that make up my current configurations:

To-do

 

Pixel Shift