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$37.23, Sep 14 7:06 pm $37.68, Nov 19 12:04 am $38.88, Nov 23 - Nov 27 $39.95, Nov 29 - Dec 5 $37.89, Dec 7 - Dec 31 $37.96, Jan 1 - Jan 16 $38.02, Jan 17 - Jan 27 $38.20, Jan 27 - Jan 29 $38.08, Jan 30 - Feb 1 $37.82, Feb 2 - Feb 8 $38.14, Feb 9 - Feb 12 $37.85, Feb 13 - Feb 17 $38.14, Feb 18 - Feb 21 $37.64, Feb 21 - Mar 7 $38.05, Mar 7 - Apr 3 $37.84, Apr 4 - Apr 16 $38.11, Apr 16 - Apr 24 $37.91, Apr 25 - May 5 $37.91, Apr 25 - May 5 $37.57, May 5 1:27 am $32.63, May 2 - Jun 2 $39.05, May 7 6:12 am $37.97, May 6 - May 26 $32.63, May 2 - Jun 2 $39.89, May 10 1:50 am $37.97, May 6 - May 26 $32.63, May 2 - Jun 2 $37.97, May 6 - May 26 $34.97, May 11 - May 15 $32.63, May 2 - Jun 2 $37.97, May 6 - May 26 $34.80, May 17 5:25 am $32.63, May 2 - Jun 2 $37.97, May 6 - May 26 $34.65, May 20 12:54 am $32.63, May 2 - Jun 2 $37.97, May 6 - May 26 $34.80, May 22 11:12 am $32.63, May 2 - Jun 2 $37.97, May 6 - May 26 $34.64, May 25 12:41 am $32.63, May 2 - Jun 2 $38.01, May 27 - Jun 3 $34.52, May 26 - May 27 $32.63, May 2 - Jun 2 $38.01, May 27 - Jun 3 $34.36, May 29 8:09 am $32.63, May 2 - Jun 2 $38.01, May 27 - Jun 3 $34.83, Jun 1 1:45 am $32.63, May 2 - Jun 2 $38.01, May 27 - Jun 3 $34.80, Jun 3 - Jun 5 $32.62, Jun 3 - Jul 1 $38.04, Jun 4 - Jun 12 $34.80, Jun 3 - Jun 5 $32.62, Jun 3 - Jul 1 $38.04, Jun 4 - Jun 12 $34.68, Jun 8 9:48 am $32.62, Jun 3 - Jul 1 $38.04, Jun 4 - Jun 12 $33.43, Jun 11 3:01 am $32.62, Jun 3 - Jul 1 $38.10, Jun 13 - Jun 22 $32.62, Jun 3 - Jul 1 $32.29, Jun 13 - Jun 15 $38.10, Jun 13 - Jun 22 $32.62, Jun 3 - Jul 1 $31.45, Jun 16 - Jun 27 $38.16, Jun 23 - Jul 9 $32.62, Jun 3 - Jul 1 $31.45, Jun 16 - Jun 27 $38.16, Jun 23 - Jul 9 $32.62, Jun 3 - Jul 1 $30.43, Jun 28 6:08 pm $38.16, Jun 23 - Jul 9 $32.62, Jun 3 - Jul 1 $29.38, Jul 1 3:31 am $38.16, Jun 23 - Jul 9 $32.63, Jul 2 - Jul 25 $29.24, Jul 3 2:43 pm $38.16, Jun 23 - Jul 9 $32.63, Jul 2 - Jul 25 $28.24, Jul 5 10:51 pm $38.16, Jun 23 - Jul 9 $32.63, Jul 2 - Jul 25 $27.22, Jul 8 2:14 pm $38.23, Jul 11 - Jul 20 $32.63, Jul 2 - Jul 25 $26.33, Jul 11 3:32 am $38.23, Jul 11 - Jul 20 $32.63, Jul 2 - Jul 25 $25.43, Jul 13 5:11 pm $38.23, Jul 11 - Jul 20 $32.63, Jul 2 - Jul 25 $24.54, Jul 16 6:50 am $38.23, Jul 11 - Jul 20 $32.63, Jul 2 - Jul 25 $24.48, Jul 17 3:40 pm $38.23, Jul 11 - Jul 20 $32.63, Jul 2 - Jul 25 $23.64, Jul 20 11:49 pm $38.29, Jul 22 - Aug 2 $32.63, Jul 2 - Jul 25 $22.89, Jul 22 - Jul 24 $38.29, Jul 22 - Aug 2 $32.62, Jul 26 - Aug 21 $22.88, Jul 25 - Jul 27 $38.29, Jul 22 - Aug 2 $32.62, Jul 26 - Aug 21 $22.15, Jul 28 3:37 pm $38.29, Jul 22 - Aug 2 $32.62, Jul 26 - Aug 21 $22.07, Jul 30 11:11 am $38.29, Jul 22 - Aug 2 $32.62, Jul 26 - Aug 21 $32.42, Aug 1 - Aug 2 $38.35, Aug 3 - Aug 12 $32.62, Jul 26 - Aug 21 $32.15, Aug 7 1:31 am $38.35, Aug 3 - Aug 12 $32.62, Jul 26 - Aug 21 $32.14, Aug 10 4:03 am $38.35, Aug 3 - Aug 12 $32.62, Jul 26 - Aug 21 $32.15, Aug 11 - Aug 13 $38.41, Aug 13 - Aug 15 $32.62, Jul 26 - Aug 21 $32.14, Aug 14 7:56 pm $38.47, Aug 17 - Aug 22 $32.62, Jul 26 - Aug 21 $32.13, Aug 15 - Aug 17 $38.47, Aug 17 - Aug 22 $32.62, Jul 26 - Aug 21 $31.89, Aug 20 1:11 am $38.47, Aug 17 - Aug 22 $33.19, Aug 22 3:13 am $31.88, Aug 21 - Aug 27 $38.08, Aug 23 - Aug 29 $33.24, Aug 27 - Aug 30 $31.88, Aug 21 - Aug 27 $38.08, Aug 23 - Aug 29 $33.24, Aug 27 - Aug 30 $31.68, Aug 29 1:27 pm $37.69, Aug 30 - Sep 5 $33.19, Aug 31 9:44 pm $31.68, Aug 31 - Sep 2 $37.69, Aug 30 - Sep 5 $33.11, Sep 3 - Sep 4 $31.69, Sep 3 8:10 am $37.69, Aug 30 - Sep 5 $32.63, Sep 5 6:03 pm $32.62, Sep 5 - Sep 8 $37.31, Sep 6 - Sep 19 $32.62, Sep 6 - Sep 8 $32.62, Sep 5 - Sep 8 $37.31, Sep 6 - Sep 19 $32.63, Sep 10 - Sep 24 $32.63, Sep 10 - Sep 24 $36.93, Sep 22 - Sep 28 $32.63, Sep 10 - Sep 24 $32.63, Sep 10 - Sep 24 $36.93, Sep 22 - Sep 28 $32.62, Sep 27 - Sep 28 $32.38, Sep 28 3:44 am $36.56, Sep 30 - Oct 4 $32.56, Sep 30 4:31 am $32.16, Sep 30 4:31 am $36.56, Sep 30 - Oct 4 $32.63, Oct 2 - Oct 4 $32.63, Oct 2 - Oct 4 $36.19, Oct 6 - Oct 12 $32.63, Oct 8 - Oct 14 $32.63, Oct 8 - Oct 14 $35.82, Oct 14 - Oct 19 $32.63, Oct 8 - Oct 14 $32.63, Oct 8 - Oct 14 $35.82, Oct 14 - Oct 19 $32.51, Oct 17 1:34 am $32.49, Oct 17 1:34 am $35.82, Oct 14 - Oct 19 $32.63, Oct 19 - Oct 23 $32.63, Oct 19 - Oct 23 $35.46, Oct 21 - Oct 23 $32.63, Oct 19 - Oct 23 $32.63, Oct 19 - Oct 23 $35.10, Oct 29 - Nov 3 $32.50, Oct 29 8:43 am $32.50, Oct 29 8:43 am $35.10, Oct 29 - Nov 3 $31.10, Nov 3 9:54 pm $30.61, Nov 3 9:54 pm $34.75, Nov 9 8:12 pm $30.75, Nov 9 8:12 pm $30.32, Nov 9 8:12 pm $34.40, Nov 15 9:02 am $30.40, Nov 15 9:02 am $30.21, Nov 15 9:02 am $34.05, Nov 18 - Nov 22 $30.05, Nov 18 - Nov 22 $30.01, Nov 18 4:08 pm $34.05, Nov 18 - Nov 22 $30.05, Nov 18 - Nov 22 $29.99, Nov 20 - Nov 26 $33.70, Nov 25 - Nov 30 $30.00, Nov 25 - Nov 26 $29.99, Nov 20 - Nov 26 $33.70, Nov 25 - Nov 30 $30.23, Nov 28 11:12 pm $30.23, Nov 28 11:12 pm $33.70, Nov 25 - Nov 30 $30.03, Nov 30 - Dec 2 $30.02, Nov 30 - Dec 2 $33.36, Dec 2 - Dec 6 $31.35, Dec 4 5:15 pm $31.35, Dec 4 5:15 pm $33.36, Dec 2 - Dec 6 $31.25, Dec 6 - Dec 8 $31.25, Dec 6 - Dec 8 $33.29, Dec 8 - Dec 12 $31.25, Dec 6 - Dec 8 $31.25, Dec 6 - Dec 8 $33.29, Dec 8 - Dec 12 $31.05, Dec 10 - Dec 14 $31.05, Dec 10 - Dec 14 $35.02, Dec 14 - Dec 16 $31.05, Dec 10 - Dec 14 $31.05, Dec 10 - Dec 14 $35.02, Dec 14 - Dec 16 $31.37, Dec 16 4:35 pm $31.37, Dec 16 4:35 pm $35.96, Dec 21 - Dec 30 $31.03, Dec 21 3:08 pm $31.03, Dec 21 3:08 pm $35.96, Dec 21 - Dec 30 $31.96, Dec 24 - Dec 30 $31.36, Dec 23 - Dec 25 $35.96, Dec 21 - Dec 30 $31.96, Dec 26 - Jan 1 $31.96, Dec 24 - Dec 30 $37.45, Jan 1 5:59 am $32.19, Jan 1 5:59 am $31.96, Dec 26 - Jan 1 $38.95, Jan 10 - Jan 15 $32.74, Jan 9 - Jan 12 $32.73, Jan 10 5:48 pm $38.95, Jan 10 - Jan 15 $32.74, Jan 9 - Jan 12 $32.74, Jan 12 12:49 am $38.95, Jan 10 - Jan 15 $32.73, Jan 14 - Jan 15 $32.63, Jan 15 11:54 pm $35.96, Jan 17 - Jan 31 $32.63, Jan 17 6:10 pm $31.96, Jan 17 - Jan 20 $35.96, Jan 17 - Jan 31 $31.96, Jan 19 - Jan 20 $31.96, Jan 17 - Jan 20 $35.96, Jan 17 - Jan 31 $32.63, Jan 22 - Jan 30 $32.63, Jan 22 - Jan 30 $35.96, Jan 17 - Jan 31 $31.95, Jan 31 10:06 pm $31.94, Jan 31 10:06 pm $37.45, Feb 2 - Feb 6 $31.90, Feb 4 12:37 pm $31.90, Feb 4 12:37 pm $37.45, Feb 2 - Feb 6 $31.86, Feb 6 6:40 am $31.86, Feb 6 6:40 am $38.19, Feb 8 - Feb 13 $31.72, Feb 9 8:48 pm $31.71, Feb 9 8:48 pm $38.19, Feb 8 - Feb 13 $31.78, Feb 11 4:07 pm $31.78, Feb 11 4:07 pm $38.19, Feb 8 - Feb 13 $31.73, Feb 13 11:23 am $31.71, Feb 13 11:23 am $38.95, Feb 15 - Feb 19 $31.66, Feb 17 7:17 am $31.62, Feb 17 7:17 am $38.95, Feb 15 - Feb 19 $31.47, Feb 19 4:02 am $31.46, Feb 19 4:02 am $39.72, Feb 21 - Feb 26 $31.30, Feb 21 1:47 am $31.19, Feb 21 1:47 am $39.72, Feb 21 - Feb 26 $31.04, Feb 24 9:02 pm $31.00, Feb 22 - Feb 24 $39.72, Feb 21 - Feb 26 $30.99, Feb 26 - Feb 28 $30.98, Feb 26 7:23 pm $40.51, Feb 28 - Mar 11 $30.99, Feb 26 - Feb 28 $30.96, Feb 28 4:45 pm $40.51, Feb 28 - Mar 11 $30.96, Mar 3 7:02 am $30.90, Mar 3 7:02 am $40.51, Feb 28 - Mar 11 $31.13, Mar 5 6:02 am $31.11, Mar 5 6:02 am $40.51, Feb 28 - Mar 11 $31.47, Mar 9 4:53 am $31.45, Mar 9 4:53 am $40.51, Feb 28 - Mar 11 $31.23, Mar 11 12:04 pm $31.16, Mar 11 12:04 pm $41.31, Mar 13 - Mar 19 $31.12, Mar 13 6:49 pm $31.11, Mar 13 6:49 pm $41.31, Mar 13 - Mar 19 $31.13, Mar 16 8:55 pm $31.07, Mar 16 8:55 pm $41.31, Mar 13 - Mar 19 $31.06, Mar 19 12:05 am $30.74, Mar 19 12:05 am $42.13, Mar 21 - Mar 25 $30.91, Mar 21 4:01 am $30.91, Mar 21 4:01 am $42.13, Mar 21 - Mar 25 $30.84, Mar 23 11:11 am $30.82, Mar 23 11:11 am $42.13, Mar 21 - Mar 25 $30.76, Mar 25 6:08 pm $30.75, Mar 25 6:08 pm $42.70, Mar 28 - Apr 25 $30.67, Mar 28 12:24 am $30.65, Mar 28 12:24 am $42.70, Mar 28 - Apr 25 $30.64, Mar 30 9:00 am $30.53, Mar 30 9:00 am $42.70, Mar 28 - Apr 25 $31.94, Apr 1 10:40 pm $30.79, Apr 1 10:40 pm $42.70, Mar 28 - Apr 25 $31.70, Apr 4 - Apr 8 $31.51, Apr 4 1:23 pm $42.70, Mar 28 - Apr 25 $31.70, Apr 4 - Apr 8 $30.88, Apr 7 4:43 am $42.70, Mar 28 - Apr 25 $31.70, Apr 4 - Apr 8 $30.65, Apr 8 1:06 pm $42.70, Mar 28 - Apr 25 $31.65, Apr 11 - Apr 14 $30.35, Apr 11 12:13 pm $42.70, Mar 28 - Apr 25 $31.65, Apr 11 - Apr 14 $29.86, Apr 14 5:37 am $42.70, Mar 28 - Apr 25 $31.66, Apr 16 8:46 pm $29.65, Apr 16 8:46 pm $42.70, Mar 28 - Apr 25 $33.08, Apr 19 - Apr 22 $29.56, Apr 19 12:20 pm $42.70, Mar 28 - Apr 25 $33.08, Apr 19 - Apr 22 $29.50, Apr 22 5:21 am $42.70, Mar 28 - Apr 25 $35.22, Apr 25 2:26 am $29.44, Apr 25 2:26 am $42.70, Apr 28 - May 6 $35.22, Apr 28 2:31 am $29.31, Apr 28 2:31 am $42.70, Apr 28 - May 6 $31.66, Apr 30 - May 6 $29.83, Apr 30 9:01 pm $42.70, Apr 28 - May 6 $31.66, Apr 30 - May 6 $30.85, May 3 1:42 pm $42.70, Apr 28 - May 6 $31.66, Apr 30 - May 6 $30.65, May 6 8:01 am $33.71, May 10 - May 30 $33.08, May 10 - May 25 $29.71, May 10 12:58 pm $33.71, May 10 - May 30 $33.08, May 10 - May 25 $32.13, May 13 4:55 pm $33.71, May 10 - May 30 $33.08, May 10 - May 25 $31.77, May 17 9:29 am $33.71, May 10 - May 30 $33.08, May 10 - May 25 $32.13, May 21 - May 25 $33.71, May 10 - May 30 $31.65, May 30 10:56 am $29.70, May 30 10:56 am $42.70, Jun 4 - Sep 28 $33.07, Jun 4 - Jul 1 $29.38, Jun 4 1:48 am $42.70, Jun 4 - Sep 28 $33.07, Jun 4 - Jul 1 $29.50, Jun 8 11:18 am $42.70, Jun 4 - Sep 28 $33.07, Jun 4 - Jul 1 $29.81, Jun 12 9:18 am $42.70, Jun 4 - Sep 28 $33.07, Jun 4 - Jul 1 $29.59, Jun 16 4:33 am $42.70, Jun 4 - Sep 28 $33.07, Jun 4 - Jul 1 $30.25, Jun 19 11:23 pm $42.70, Jun 4 - Sep 28 $33.07, Jun 4 - Jul 1 $30.07, Jun 23 5:31 pm $42.70, Jun 4 - Sep 28 $33.07, Jun 4 - Jul 1 $30.01, Jun 27 12:26 pm $42.70, Jun 4 - Sep 28 $33.07, Jun 4 - Jul 1 $29.83, Jul 1 2:38 pm $42.70, Jun 4 - Sep 28 $35.09, Jul 5 9:05 pm $29.68, Jul 5 9:05 pm $42.70, Jun 4 - Sep 28 $37.23, Jul 11 9:15 pm $29.64, Jul 11 9:15 pm $42.70, Jun 4 - Sep 28 $37.47, Jul 15 12:41 pm $30.04, Jul 15 12:41 pm $42.70, Jun 4 - Sep 28 $37.35, Jul 19 2:18 am $29.80, Jul 19 2:18 am $42.70, Jun 4 - Sep 28 $36.15, Jul 22 5:38 pm $29.68, Jul 22 5:38 pm $42.70, Jun 4 - Sep 28 $35.95, Jul 26 7:45 am $29.52, Jul 26 7:45 am $42.70, Jun 4 - Sep 28 $31.26, Jul 29 - Aug 6 $29.69, Jul 29 - Aug 6 $42.70, Jun 4 - Sep 28 $31.17, Aug 9 10:31 pm $29.58, Aug 9 10:31 pm $42.70, Jun 4 - Sep 28 $31.26, Aug 13 5:16 pm $29.74, Aug 13 - Aug 17 $42.70, Jun 4 - Sep 28 $31.34, Aug 17 - Aug 24 $29.74, Aug 13 - Aug 17 $42.70, Jun 4 - Sep 28 $31.34, Aug 17 - Aug 24 $29.85, Aug 21 - Aug 24 $42.70, Jun 4 - Sep 28 $31.08, Aug 28 - Sep 1 $29.71, Aug 28 5:10 pm $42.70, Jun 4 - Sep 28 $32.33, Sep 1 9:56 am $31.08, Aug 28 - Sep 1 $42.70, Jun 4 - Sep 28 $32.13, Sep 5 7:29 am $32.12, Sep 5 7:29 am $42.70, Jun 4 - Sep 28 $32.11, Sep 9 5:29 am $32.10, Sep 9 5:29 am $42.70, Jun 4 - Sep 28 $32.07, Sep 13 - Oct 10 $32.06, Sep 13 - Oct 10 $43.55, Oct 2 - Oct 14 $32.07, Sep 13 - Oct 10 $32.06, Sep 13 - Oct 10 $43.55, Oct 2 - Oct 14 $31.81, Oct 14 10:29 pm $31.79, Oct 14 10:29 pm $44.95, Oct 18 - Apr 16 $31.08, Oct 18 - Oct 22 $30.70, Oct 18 6:14 pm $44.95, Oct 18 - Apr 16 $31.08, Oct 18 - Oct 22 $30.57, Oct 22 3:42 pm $44.95, Oct 18 - Apr 16 $30.99, Oct 26 12:28 pm $30.49, Oct 26 12:28 pm $44.95, Oct 18 - Apr 16 $30.41, Oct 30 11:25 am $30.35, Oct 30 11:25 am $44.95, Oct 18 - Apr 16 $30.35, Nov 1 11:12 am $30.25, Nov 1 11:12 am $44.95, Oct 18 - Apr 16 $30.27, Nov 5 1:06 pm $29.92, Nov 5 1:06 pm $44.95, Oct 18 - Apr 16 $31.01, Nov 9 3:33 pm $29.54, Nov 9 3:33 pm $44.95, Oct 18 - Apr 16 $30.93, Nov 13 6:21 pm $29.21, Nov 13 6:21 pm $44.95, Oct 18 - Apr 16 $30.83, Nov 18 1:36 am $29.03, Nov 18 1:36 am $44.95, Oct 18 - Apr 16 $31.80, Nov 22 10:59 am $29.86, Nov 22 10:59 am $44.95, Oct 18 - Apr 16 $33.39, Nov 26 10:24 pm $33.38, Nov 26 10:24 pm $44.95, Oct 18 - Apr 16 $32.12, Nov 29 7:27 am $32.11, Nov 29 7:27 am $44.95, Oct 18 - Apr 16 $32.08, Dec 4 4:47 am $32.07, Dec 4 4:47 am $44.95, Oct 18 - Apr 16 $33.38, Dec 9 2:53 am $33.36, Dec 9 2:53 am $44.95, Oct 18 - Apr 16 $33.08, Dec 14 5:41 am $33.08, Dec 14 5:41 am $44.95, Oct 18 - Apr 16 $33.41, Dec 19 7:47 am $33.40, Dec 19 7:47 am $44.95, Oct 18 - Apr 16 $32.78, Dec 24 3:34 am $32.77, Dec 24 3:34 am $44.95, Oct 18 - Apr 16 $32.12, Dec 29 - Jan 3 $32.11, Dec 29 5:39 am $44.95, Oct 18 - Apr 16 $32.12, Dec 29 - Jan 3 $32.03, Jan 3 12:46 am $44.95, Oct 18 - Apr 16 $31.85, Jan 7 10:20 pm $31.83, Jan 7 10:20 pm $44.95, Oct 18 - Apr 16 $31.72, Jan 10 - Jan 15 $31.71, Jan 10 9:36 am $44.95, Oct 18 - Apr 16 $31.73, Jan 15 8:31 am $31.72, Jan 10 - Jan 15 $44.95, Oct 18 - Apr 16 $31.54, Jan 20 8:32 am $31.53, Jan 20 8:32 am $44.95, Oct 18 - Apr 16 $31.18, Jan 25 8:52 am $31.18, Jan 25 8:52 am $44.95, Oct 18 - Apr 16 $31.04, Jan 30 8:52 am $30.99, Jan 30 8:52 am $44.95, Oct 18 - Apr 16 $32.13, Feb 4 11:20 am $32.12, Feb 4 11:20 am $44.95, Oct 18 - Apr 16 $30.78, Feb 9 1:15 pm $30.77, Feb 9 1:15 pm $44.95, Oct 18 - Apr 16 $35.76, Feb 14 8:37 pm $33.02, Feb 14 8:37 pm $44.95, Oct 18 - Apr 16 $32.44, Feb 20 4:51 am $32.43, Feb 20 4:51 am $44.95, Oct 18 - Apr 16 $31.53, Feb 25 5:23 pm $31.51, Feb 25 5:23 pm $44.95, Oct 18 - Apr 16 $30.79, Mar 7 12:39 am $30.78, Mar 7 12:39 am $44.95, Oct 18 - Apr 16 $34.73, Mar 18 9:41 am $30.59, Mar 18 9:41 am $44.95, Oct 18 - Apr 16 $33.36, Mar 24 - Apr 4 $25.02, Mar 24 - Apr 4 $44.95, Oct 18 - Apr 16 $29.88, Apr 16 2:51 pm $29.66, Apr 16 2:51 pm
111,953 1,256,051
1,562,500
1,041,667
520,833
0
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Price Details
New
Latest
$44.95 Apr 16, '16
Highest
$44.95 Oct 18, '15
Lowest
$33.29 Dec 8, '14
Average
$44.95 (30d avg) $44.95 (90d avg) $44.95 (180d avg) $43.25 (365d avg) $39.87 (Lifetime average)
Added
Sep 14, 2013
3rd Party New
Latest
$29.88 Apr 16, '16
Highest
$33.41 Dec 19, '15
Lowest
$29.31 Apr 28, '15
Average
$32.79 (30d avg) $31.94 (90d avg) $31.87 (180d avg) $31.21 (365d avg) $31.60 (Lifetime average)
Added
Sep 14, 2013
3rd Party Used
Latest
$29.66 Apr 16, '16
Highest
$39.89 May 10, '14
Lowest
$21.38 Jul 31, '14
Average
$27.03 (30d avg) $30.18 (90d avg) $30.85 (180d avg) $31.85 (365d avg) $31.70 (Lifetime average)
Added
Sep 14, 2013
Sales Rank
30 day average: 902,899 90 day average: 912,026
Product Description
As distributed astronomical projects multiply, this text on how to produce professional-quality space imaging will be welcome to many amateurs equipped with todays powerful telescopy. It offers a thorough grounding in the scientific principles and methods.
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