Issue: The focus script works, but the range is not wide enough.
The script should run from a focus position of -3000 to +3000 in steps of 300.

---

Focus History (remember that each night the counter resets to 0 even though the focus position does not change).

• Jan 15. Focus: -3000 (approx)
• Jan 17. Focus: +3200 (approx) beginning, +2300 end
• Jan 18. Focus: -1800 at beginning (KPD2109, AM=1.9, HA=5
• Jan 19. Focus: ~100-500. Some clouds so hard to be too precise.
• Jan 26: Focus: 1800 at beginning.
  Then at 9:30pm it was 800.
  at 10:30, changed targets, had to shutdown and restart rts2, focus at -300.
• Jan. 27: Focus: 600 at beginning.
• Feb. 3: Focus: 2200 at beginning.
  600 when switched at 10pm.
• Feb. 5: Focus: -1700 at 10:30pm (first focus of the night)
• Feb. 6: Focus: 2900 at 7pm:
  1800 at 10:15.
• Feb. 7: Focus: 2000 at start,
  had to restart rts2: then focus -600 (which would be 1400 compared to the start of the night).
• Feb. 8: Focus: 1500 at start
• Feb. 10: Focus: 0 is pretty good on PG1219.
• Feb 11: Focus: -1800 at 10pm on PG1219

What a current focus run looks like:
2015-02-03 20:00:11,163:root:INFO:Focus: pos: -900, fwhm: 35.24, stdFwhm 8.75, objects: 11, file: /tmp/rts2saf_focus/2015-02-03T19:59:34.692991/W0/BG40/20150204020000-058-R A.fits
2015-02-03 20:00:22,751:root:INFO:Focus: pos: -800, fwhm: 34.62, stdFwhm 9.83, objects: 11, file: /tmp/rts2saf_focus/2015-02-03T19:59:34.692991/W0/BG40/20150204020011-674-R A.fits
2015-02-03 20:00:34,277:root:INFO:Focus: pos: -700, fwhm: 31.32, stdFwhm 8.99, objects: 11, file: /tmp/rts2saf_focus/2015-02-03T19:59:34.692991/W0/BG40/20150204020023-222-R A.fits
2015-02-03 20:00:45,878:root:INFO:Focus: pos: -600, fwhm: 32.36, stdFwhm 7.34, objects: 13, file: /tmp/rts2saf_focus/2015-02-03T19:59:34.692991/W0/BG40/20150204020034-790-R A.fits
2015-02-03 20:00:57,467:root:INFO:Focus: pos: -500, fwhm: 33.51, stdFwhm 10.33, objects: 12, file: /tmp/rts2saf_focus/2015-02-03T19:59:34.692991/W0/BG40/20150204020046-356-R A.fits
2015-02-03 20:01:08,977:root:INFO:Focus: pos: -400, fwhm: 34.37, stdFwhm 3.32, objects: 10, file: /tmp/rts2saf_focus/2015-02-03T19:59:34.692991/W0/BG40/20150204020057-889-R A.fits
2015-02-03 20:01:20,577:root:INFO:Focus: pos: -300, fwhm: 32.26, stdFwhm 9.10, objects: 11, file: /tmp/rts2saf_focus/2015-02-03T19:59:34.692991/W0/BG40/20150204020109-499-R A.fits
2015-02-03 20:01:32,214:root:INFO:Focus: pos: -200, fwhm: 31.30, stdFwhm 8.43, objects: 12, file: /tmp/rts2saf_focus/2015-02-03T19:59:34.692991/W0/BG40/20150204020121-114-R A.fits
2015-02-03 20:01:43,803:root:INFO:Focus: pos: -100, fwhm: 32.05, stdFwhm 5.83, objects: 12, file: /tmp/rts2saf_focus/2015-02-03T19:59:34.692991/W0/BG40/20150204020132-714-R A.fits
2015-02-03 20:01:55,435:root:INFO:Focus: pos: 0, fwhm: 34.14, stdFwhm 5.95, objects: 10, file: /tmp/rts2saf_focus/2015-02-03T19:59:34.692991/W0/BG40/20150204020144-320-R A.fits
2015-02-03 20:02:07,053:root:INFO:Focus: pos: 100, fwhm: 30.68, stdFwhm 6.75, objects: 11, file: /tmp/rts2saf_focus/2015-02-03T19:59:34.692991/W0/BG40/20150204020155-975-R A.fits
2015-02-03 20:02:18,696:root:INFO:Focus: pos: 200, fwhm: 32.32, stdFwhm 8.90, objects: 12, file: /tmp/rts2saf_focus/2015-02-03T19:59:34.692991/W0/BG40/20150204020207-558-R A.fits
2015-02-03 20:02:30,334:root:INFO:Focus: pos: 300, fwhm: 30.86, stdFwhm 5.96, objects: 10, file: /tmp/rts2saf_focus/2015-02-03T19:59:34.692991/W0/BG40/20150204020219-222-RA.fits
2015-02-03 20:02:41,933:root:INFO:Focus: pos: 400, fwhm: 32.62, stdFwhm 5.89, objects: 9, file: /tmp/rts2saf_focus/2015-02-03T19:59:34.692991/W0/BG40/20150204020230-838-R A.fits
2015-02-03 20:02:53,472:root:INFO:Focus: pos: 500, fwhm: 32.10, stdFwhm 5.43, objects: 12, file: /tmp/rts2saf_focus/2015-02-03T19:59:34.692991/W0/BG40/20150204020242-406-R A.fits
2015-02-03 20:03:05,004:root:INFO:Focus: pos: 600, fwhm: 31.44, stdFwhm 9.71, objects: 12, file: /tmp/rts2saf_focus/2015-02-03T19:59:34.692991/W0/BG40/20150204020253-938-R A.fits
2015-02-03 20:03:16,593:root:INFO:Focus: pos: 700, fwhm: 30.62, stdFwhm 5.31, objects: 11, file: /tmp/rts2saf_focus/2015-02-03T19:59:34.692991/W0/BG40/20150204020305-506-R A.fits
2015-02-03 20:03:28,203:root:INFO:Focus: pos: 800, fwhm: 30.34, stdFwhm 7.59, objects: 11, file: /tmp/rts2saf_focus/2015-02-03T19:59:34.692991/W0/BG40/20150204020317-070-R A.fits
2015-02-03 20:03:39,736:root:INFO:Focus: pos: 900, fwhm: 29.24, stdFwhm 3.09, objects: 8, file: /tmp/rts2saf_focus/2015-02-03T19:59:34.692991/W0/BG40/20150204020328-658-R A.fits
2015-02-03 20:03:51,402:root:INFO:Focus: pos: 1000, fwhm: 27.34, stdFwhm 8.23, objects: 13, file: /tmp/rts2saf_focus/2015-02-03T19:59:34.692991/W0/BG40