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 |
Armenia, 26 Apr 2019
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).Regarding Mitutoyo,
"One of the metrology/inspection manufacturers, Mitutoyo, makes some spectacular infinity corrected objectives
featuring very long working distances. They are quite large and have an odd thread (M26, but 0.706 mm pitch instead
of the BD pitch of 0.75 mm), so are not easily used. However, they make incredible "extreme-macro" lenses."
- Source
Regarding sharpness,
"It depends on what you mean by "sharp". Because of its larger aperture, NA 0.42 versus 0.25,
the 20X objective will resolve much finer detail on subject. But at rated magnification, the
combination of 20X NA 0.42 will be running at effective f/24, while 10X NA 0.25 will be
effective f/20. (The formula is Feff=mag/(2*NA).) As a result, the 20X image will be more
diffracted and will have less crisp pixel-to-pixel detail than the 10X image.
[But,] to do a direct comparison, you could resize either image to match the other, or resize both of them to some other standard like 14X. In any of those cases, the image from the NA 0.42 objective should be significantly sharper than the image from the NA 0.25 objective, after resizing so that both of them show the same FOV on subject." - Source
[But,] to do a direct comparison, you could resize either image to match the other, or resize both of them to some other standard like 14X. In any of those cases, the image from the NA 0.42 objective should be significantly sharper than the image from the NA 0.25 objective, after resizing so that both of them show the same FOV on subject." - Source
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 |
References: - Labeling of Objectives - Objective Lenses - a nice overview |
Sources: - AmScope Infinity Corrected - Edmunds: Mitutoyo - Edmunds: Olympus - SEO: Nikon |
My Test Results
Armenia, 26 Apr 2019
To-do |
Tube Lens |
Lake Placid, 2 May 2019
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 |
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Lake Placid, 17 Aug 2019
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 (?) |
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My Test Results
Lake Placid, 30 May 2019
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 |
References:
- Previous Measurements
More PhotoGeekery: Finite Conjugate MTF Bench Tests for Macro Lenses by Roger Cicala, August 15, 2016.
- Setting up a tube lens
Raynox DCR-150 tube assembly with flocking
- Robert O'Toole
TUBE LENS TEST 2018
RAYNOX TUBE LENSES
THORLABS ITL200 TUBE LENS TEST
- Previous Measurements
More PhotoGeekery: Finite Conjugate MTF Bench Tests for Macro Lenses by Roger Cicala, August 15, 2016.
- Setting up a tube lens
Raynox DCR-150 tube assembly with flocking
- Robert O'Toole
TUBE LENS TEST 2018
RAYNOX TUBE LENSES
THORLABS ITL200 TUBE LENS TEST
Condenser |
Lake Placid, 24 May 2019
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
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![]() Olympus Condenser
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My Test Results
Lake Placid, 24 May 2019
To-do |
Collimeter |
Lake Placid, 24 May 2019
Here is what I have available to test.Make & Model | Aperture | Price |
Leitz | $66 | |
Olympus | $59 |
![]() Leitz Collimeter
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![]() Olympus Collimeter
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My Test Results
Lake Placid, 24 May 2019
To-do |
Polarizers |
Lake Placid, 24 May 2019
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 |
My Test Results
Armenia, 26 Apr 2019
To-do |
Retardation Plates |
Lake Placid, 24 May 2019
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 |
My Test Results
Armenia, 26 Apr 2019
To-do |
Tubes |
Lake Placid, 5 May 2019
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 |
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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 |
Background
Armenia, 26 Apr 2019
My Test Results
Armenia, 26 Apr 2019