Where’s the Pocket? (Part II)

So last time I was running the numbers, I had a sample of nearly 32000 shots over a 21 month span using my A390, Nex-5, and A77 bodies, with a handful of lenses. I definitely discriminated on focal lengths of prime lenses and on the extreme ends of zoom lenses. I favored my 85mm f/1.4 ZA lens more than 50% of the time, and of focal lengths on Zoom lenses not on the extreme ends, I preferred 90mm first and 250mm second. I also used 200mm on lenses where 200mm wasn’t an extreme end a significant amount.

This photo will help me with front-page formatting. The first table seems to merge with the links on the side.

DSC01707

This post, I will focus on Aperture. Using the same lens sample, I broke down the apertures and ran numbers on the number of capable lenses, and then I ran numbers on shutter speeds. Excuse the complexity of the table, but once I got started, I couldn’t stop!

The top three rows are bold and italicized.

f #

# lens

# shots

% shots

SS
high

SS low

SS most used

SS most used #

SS 2nd  most used

SS 2nd most used #

Top 2%

1.4

1

5032

15.77%

1/8000s

30s

1/640s

373

1/500s

368

14.73%

1.6

1

155

0.49%

1/8000s

30s

1/200s

17

1/60s

15

20.65%

1.7

1

122

0.38%

1/5000s

1/25s

1/200s

21

1/1600s

19

32.79%

1.8

2

1159

3.63%

1/8000s

1/2s

1/20s

137

1/30s

127

22.78%

2

4

1568

4.92%

1/6400s

6s

1/80s

411

1/100s

89

31.89%

2.2

4

354

1.11%

1/6400s

1/8s

1/80s

65

1/60s

40

29.66%

2.5

4

512

1.60%

1/4000s

1/4s

1/250s*

54

1/60s

53

20.90%

2.8

8

2559

8.02%

1/8000s

30s

1/30s

365

1/60s

187

21.57%

3.2

7

1093

3.43%

1/6400s

30s

1/160s

188

1/250*

97

26.08%

3.5

11

1663

5.21%

1/4000s

30s

1/30s

216

1/80s

146

21.77%

4

14

3937

12.34%

1/8000s

20s

1/250s*

654

1/400s**

618

32.31%

4.5

15

1503

4.71%

1/5000s

30s

1/250s*

284

1/320s

171

30.27%

5

14

1150

3.60%

1/8000s

30s

1/400s**

181

1/320s

121

26.26%

5.6

15

3566

11.18%

1/4000s

30s

1/250s*

490

1/500s

419

25.49%

6.3

16

2714

8.51%

1/8000s

30s

1/250s*

285

1/500s

268

20.38%

7.1

14

490

1.54%

1/2000s

30s

1/500s

66

1/640s

61

25.92%

8

16

1754

5.50%

1/8000s

30s

1/320s

187

1/400s**

182

21.04%

9

15

632

1.98%

1/640s

30s

1/250s*

102

1/400s**

88

30.06%

10

15

357

1.12%

1/1000s

30s

1/400s**

41

1/200s

39

22.41%

11

14

249

0.78%

1/500s

30s

1/160s

26

30s

20

18.47%

13

12

147

0.46%

1/5000s

30s

1/125s

19

1/50s

17

24.49%

14

8

110

0.34%

1/500s

30s

1/60s

29

1/50s

16

40.91%

16

9

97

0.30%

1/500s

30s

1/50s

17

1/30s

12

29.90%

18

6

58

0.18%

1/250s

30s

1/50s

13

1/80s

11

41.38%

20

5

95

0.30%

1/320s

30s

1/60s

18

1/50s

15

34.74%

22

13

742

2.33%

1/8000s

30s

1/30s

97

1/50s

80

23.85%

25

4

17

0.05%

1/100s

1.6s

1/60s

7

1/10s

3

58.82%

29

3

6

0.02%

1/10s

20s

1/10s

3

20s

2

83.33%

32

4

55

0.17%

1/160s

4s

1/4s

20

1/13s

5

45.45%

36

2

5

0.02%

1/400s

15s

All tied

1

All Tied

1

40.00%

ALL

16

31901

100%

1/8000s

30s

1/250s

2951

1/400s

2327

16.54%

The top shutter speed is denoted with one asterisk (1/250s*) and the second most utilized shutter speed is denoted with two asterisks (1/400s**).

I know it is a ton of data, but I think I can pull some significant portions of the data out to help with findings. I found it interesting I didn’t use f/2.8 as much. It is a common aperture and the aperture of a couple of the lenses wide open. One thing I found interesting was the top two values for f/4 were and f/5. higher than the top values for 1.4.

What I wonder about skewing the statistics are the wide open apertures at the extreme ends of the zoom lenses. Some were at f/5.6 and others at f/6.3, both f/5.6 and f/6.3 were 3rd and 4th respectively in the overall aperture totals.

I think a variable which comes into consideration here I am not considering yet is ISO. I use ISO to move the shutter speeds up. I could try to triangulate aperture, shutter speed and ISO, but I am going to just look at the aperture vs. ISO distribution for my 85mm f/1.4 lens which represents more than 50% of my overall clicks.

The distribution of my 85mm f/1.4 wide open was all over the map. I did find the 85mm to be consistent in ISO, however and I outlined the data in the table below:

F# # % ISO High ISO Low Top ISO Top # 2nd ISO 2nd # %ISO
top 2
1.4 5032 30.23% 8000 50 100* 1563 400** 1375 58.39%
1.6 155 0.93% 1600 50 100* 56 200 42 63.23%
1.7 122 0.73% 1600 50 100* 49 50 22 58.20%
2 359 2.16% 1600 50 400** 145 100* 127 75.77%
2.2 220 1.32% 1600 50 100* 95 400** 64 72.27%
2.5 406 2.44% 1600 50 100* 215 200 112 80.54%
2.8 940 5.65% 1600 50 100* 332 400** 280 65.11%
3.2 774 4.65% 1600 50 200 284 100* 186 60.72%
3.5 724 4.35% 1600 50 100* 237 400** 179 57.46%
4 2450 14.72% 1600 50 100* 1171 400** 555 70.45%
4.5 730 4.38% 2500 50 100* 312 400** 139 61.78%
5 625 3.75% 3200 50 100* 236 400** 155 62.56%
5.6 1616 9.71% 1600 50 100* 1000 50 246 77.10%
6.3 716 4.30% 5000 50 100* 269 200 246 71.93%
7.1 227 1.36% 6400 50 100* 137 50 32 74.45%
8 804 4.83% 1600 50 100* 447 400** 173 77.11%
9 296 1.78% 10000 50 80 98 50 92 64.19%
10 158 0.95% 12800 50 100* 84 160 21 66.46%
11 49 0.29% 1600 50 100* 24 400** 11 71.43%
13 49 0.29% 800 50 100* 31 50 7 77.55%
14 57 0.34% 400 50 50 31 100* 20 89.47%
16 26 0.16% 400 50 100* 14 400** 11 96.15%
18 11 0.07% 800 50 100* 8 50 2 90.91%
20 8 0.05% 100 50 100* 6 50 2 100.00%
22 94 0.56% 1000 50 100* 52 50 37 94.68%
TOTAL 16648 100.00% 12800 50 100
6740 400 3451 61.21%

f/1.4, f/4 and f/5.6 took nearly 50% of the clicks overall and the three respectively at ISO 100 took 20% of the overall clicks. Also noteworthy is the usage of f/5.6 and f/6.3 on the 85mm lens versus overall usage (1616/3566, 45.3% and 716/2714, 26.4%).

I know I haven’t mined all of the data and I have left some of the data out on purpose. A loose conclusion can be made here, however and I think it was something I could have predicted. I like my 85mm lens at f/1.4, f/4 and f/5.6 at either ISO 100 or ISO 400. Most surprising are the shutter speed statistics. I would have thought 1/60s would have been higher. It surprises me that 1/250s and 1/400s came out on top.

Overall the shutter speed distribution is all over the board, with no dominant top speed. In fact there is a good distribution for the counts above 1000 clicks. All counts between 1/30s and 1/640s are represented in the top 13 except for 1/40s.

Speed Clicks %total
1/250s 2951 9.25%
1/400s 2327 7.29%
1/80s 2153 6.75%
1/500s 1860 5.83%
1/320s 1858 5.82%
1/125s 1738 5.45%
1/160s 1674 5.25%
1/60s 1663 5.21%
1/30s 1500 4.70%
1/100s 1450 4.55%
1/200s 1434 4.50%
1/640s 1263 3.96%
1/50s 1151 3.61%
Top 13 total 23022 72.17%

It surprises me how much 1/80s is used and how little 1/320s isn’t used considering 1/250s and 1/400s are.

I could go on for days, but I also need to start taking my sample apart. I know there are throwaways or test shots in this data. I know there are duplicates or bursts in here where a lot of the shots look the same. I think I can live with 85mm f/1.4, ISO 100, 1/250s as my pocket for now, but I need to take more things into account. That particular combination only accounts for 129 shots. My favorite hockey combination of 85mm, f/4, 1/400, ISO 400 has 426 shots in comparison. Maybe it isn’t surprising 1/400s was up toward the top, Hockey is faster which means more shot bursts. This game-winning overtime goal was cropped out of a shot using the f/4, 1/400, ISO 400 combo.

DSC03017a

There are definitely things I am not taking into consideration. 85mm f/5.6, 1/250, ISO 100 has 337 shots. I can break down individual combinations later. I really need to stop before I can’t post anymore. Until then, I give you my favorite shot with the 85mm, f/1.4, 1/250s, ISO 100 combo.

DSC09417

I sent my A77 in for repair this morning and I am “forced” to use the A900. I can see a post or two in my future about my A900 experience.

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