EV / Scene
Equipment
Star tracker · Sturdy tripod · Lens heater · Dew shield · Light pollution filter · External power bank · Remote intervalometer · Bahtinov mask · Spare batteries · Red light headlamp
EV -7 — Excellent dark site (Bortle 1, solar max)
Mount
FL
ISO
EV Matrix · Tripod · Rule of 500 · Untracked · Capture the stars
f/8mm10mm12mm14mm
142s33s28s24s
1.442s33s28s24s
242s33s28s24s
2.842s33s28s24s
442s33s28s24s
5.642s33s28s24s
842s33s28s24s
1142s33s28s24s
● within ISO ● within 1 stop ● needs more ISO

Max exposure before star trails = 500 / (crop x FL). Each cell shows the longest untracked exposure at that aperture and focal length. Green means your selected ISO is enough. Amber means you are within one stop — recoverable with exposure push and noise reduction. Red means the exposure does not gather enough light at this ISO.

How marks workNightscape guideFind dark skies
Mark
Type
Brand
f/
Coma
Astig
WR
Price
Mark↓↕Brand↕Model↕FL↕Coma↕Astig↕f/↕Rule 500↕Ideal ISO↕WRPrice↕
Samyang12mm f/212mm1.52f/228s1,843~$500
Sigma15mm f/1.4 DC DN C15mm1.52f/1.422s1,129~$750
ViltroxAF 15mm f/1.715mm1.51.5f/1.722s1,665~$500
FujifilmXF 14mm f/2.8 R14mm12f/2.824s4,215~$1250
FujifilmXF 8-16mm f/2.8 R LM WR8mm11.5f/2.842s2,408~$1500
Tokinaatx-m 11-18mm f/2.8 X11mm1.51f/2.830s3,312~$750
FujifilmXF 10-24mm f/4 R OIS WR10mm11.5f/433s6,144~$1250
Tamron11-20mm f/2.8 Di III-A RXD11mm1.50.5f/2.830s3,312~$500
ViltroxAF 13mm f/1.4 STM13mm0.52f/1.426s978~$500
FujifilmXF 8mm f/3.5 R WR8mm11f/3.542s3,763~$500
~$500
Samyang 12mm f/2
f/212mm28sISO 1,843Coma 1.5Astig 2300g
~$750
Sigma 15mm f/1.4 DC DN C
f/1.415mm22sISO 1,129Coma 1.5Astig 2420g
~$500
Viltrox AF 15mm f/1.7
f/1.715mm22sISO 1,665Coma 1.5Astig 1.5206g
~$1250
Fujifilm XF 14mm f/2.8 R
f/2.814mm24sISO 4,215Coma 1Astig 2200g
~$1500
Fujifilm XF 8-16mm f/2.8 R LM WR
f/2.88-16mm42sISO 2,408Coma 1Astig 1.5805g
~$750
Tokina atx-m 11-18mm f/2.8 X
f/2.811-18mm30sISO 3,312Coma 1.5Astig 1320g
~$1250
Fujifilm XF 10-24mm f/4 R OIS WR
f/410-24mm33sISO 6,144Coma 1Astig 1.5385g
~$500
Tamron 11-20mm f/2.8 Di III-A RXD
f/2.811-20mm30sISO 3,312Coma 1.5Astig 0.5335g
~$500
Viltrox AF 13mm f/1.4 STM
f/1.413mm26sISO 978Coma 0.5Astig 2410g
~$500
Fujifilm XF 8mm f/3.5 R WR
f/3.58mm42sISO 3,763Coma 1Astig 1180g
FL is a creative choice, not a scoring input. Primary: coma, astigmatism, aperture. Secondary: chromatic/spherical aberration, sharpness wide open, vignetting.