July 22, 2014. Beaver Meadow. 16” [F/4.5]. Clear, transparency average, seeing average to good by CSC. Astronomical twilight 22:47, 03:14. Observations begun 23:15. SQM-L 21.25 overhead and 21.10 in the area of M17.
M17 and M18 at the low power with the 40-mm Pentax are just framed in the field of view. M18 seems to be completely resolved, probably showing just the brightest stars but without a nebulous background. M17 without the filter shows the swan shape. With OIII filter at the same magnification, the IC  nebulosity to the W is noticeable around a pair of faint stars. No such nebulosity is visible around brighter stars or without the filter around that pair of stars. With the filter, there is a loop of mottled nebulosity from the front to the back of the Swan. Low-power observations finished 00:00. Medium-power observations with the 13-mm Ethos finished 00:35. High-power observations with the 8-mm Ethos finished 01:00. [See the drawing, a composite in OIII.] The view without the filter is essentially the same, showing the same details, and the nebulosity is brighter, but the contrast with the sky is lower: the sky is much brighter without the filter.
Time 01:20. M18 at the high power looks essentially the same as at the low power [see description above with M17]. It is just framed by the 8-mm Ethos. There are a dozen bright stars, approximately of equal brightness, and these are the stars that are visible at the low power. They are white in color, and there are a dozen stars that are fainter and also approximately of equal brightness. They are intermingled with the brightest stars. In the center, there is an extended irregular pentagon of bright stars that was visible at the low power, and inside it five faint stars in the form of the letter “Y”. In the SSW, at the periphery of the cluster, there is a curious structure demonstrating the juxtaposition of faint and bright stars. In this case, there are two lines, or very shallow arcs: one formed, or at least flanked, by bright stars, and the other, running parallel to it and bending in the same direction, that is formed by the faint stars. In each case, the flanking stars are brighter than the middle star.
Time 02:00. M75 at the low power is small, compact, and slightly textured. It is indicated from the W and S by a dipper-like asterism that is almost one field of the Pentax wide. At the high power it is unresolved and small in the field of the 8-mm Ethos. Interestingly, at this power it appears almost smooth. There is a bright core that is not sharp, and a fainter, gradually fading halo. A field star is to the SSE. There is a suggestion of flattening from the SSE side, but it may be an illusion connected with an arc of three faint stars that are running on that side of the cluster; however, the stars are well separated by about one cluster diameter from the halo. This arc of stars is twice as close to the center of the cluster as the mentioned brighter field star.
Time 02:15. M52 at the low power is well delineated from the rich Milky Way field. It appears to be mostly resolved, although there may be faint unresolved background. The lucida is on the S edge. It is warmly colored; the rest of the cluster is white. The cluster appears to be triangular, with a faint patch of stars detached from the right-angle corner that is facing approximately NW. The broad and diffuse base of the cluster is facing approximately SE. The two other edges of the triangle are quite sharp. The lucida resides in the S or SW corner of the triangle. The stars in the triangle are concentrated toward its right-angle corner. At the high power with the 8-mm Ethos, the cluster seems fully resolved and transparent, although there are many threshold stars next to the bright ones, which are difficult to see.
Time 02:40. M103 at the low power just fits in the field with Delta Cas. It is located to the NE of the bright star. Three brightest stars run from the SE to the NW across the cluster and define its extent at the low power. The middle one of the three stars has an almost equal companion to the SW, in the middle of the cluster. On the SW edge of the cluster is a fainter star that defines the triangular shape with the two brightest ones. The two stars in the middle are warmly colored, and the other stars, forming the outside triangle, are white. The white color is especially well perceived in the two brightest stars. A sprinkling of fainter stars fills the triangle. At the high power, the lucida in the N corner of the outside triangle, which is Struve 131, is resolved. The main component has a slight topaz coloration, and the fainter companion, pointing inwards into the cluster, appears almost greenish. A much fainter star is at the same distance and on the same line farther inwards. At this magnification the cluster appears to be fully resolved and transparent, and to have black background. The stars are uniformly distributed inside, and to an extent outside, the triangle. The brighter of the two warm-colored stars in the middle retains its coloration at this magnification, and in fact the color is a deeper reddish: [it is] brick-colored.